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Home » Recipe Index » Easy Vegetarian Hash Brown Breakfast Casserole

Easy Vegetarian Hash Brown Breakfast Casserole

June 22, 2025 by Amanda

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An Easy Vegetarian Hash Brown Breakfast Casserole is the perfect dish to start your day! This delightful casserole combines the comforting textures of hash browns with fluffy eggs, vibrant vegetables, and gooey cheese. It’s an ideal choice for brunches, family gatherings, or busy weekday mornings when you want a nutritious meal that requires minimal effort. With its rich flavors and satisfying ingredients, this casserole will quickly become a favorite in your breakfast rotation.

Why You’ll Love This Recipe

  • Quick Preparation: With just a few simple steps, you can have a delicious breakfast ready in no time.
  • Nutritious Ingredients: Packed with vegetables and protein-rich eggs, this casserole offers a healthy start to your day.
  • Versatile Dish: Customize it with your favorite veggies or cheeses for endless variations.
  • Make-Ahead Friendly: Prepare it the night before and simply bake it in the morning for a hassle-free breakfast.
  • Crowd-Pleaser: Perfect for feeding a group, this dish is sure to impress family and friends.

Tools and Preparation

Before diving into this tasty recipe, gather your tools. Having the right equipment makes the cooking process smoother and more enjoyable.

Essential Tools and Equipment

  • 9X13 inch baking dish
  • Mixing bowl
  • Whisk
  • Measuring cups and spoons
  • Knife and cutting board

Importance of Each Tool

  • Baking Dish: The 9X13 inch size ensures even cooking of the casserole while providing ample space for all ingredients.
  • Mixing Bowl: A large bowl helps combine ingredients efficiently without mess.
  • Whisk: Perfect for beating eggs thoroughly, ensuring a fluffy texture.

Ingredients

An easy, filling, nutritious breakfast casserole made with eggs, hash browns, bell pepper, onion, and delicious, melty cheese.

For the Casserole

  • 20 ounce bag fresh or frozen bag hash browns
  • 10 large eggs
  • 1/2 cup skim milk
  • 1 bell pepper, diced (I used 1/2 red bell pepper and 1/2 green bell pepper)
  • 1/2 cup yellow onion, diced
  • 1/4 cup green onion, sliced + 1 tablespoon for garnish
  • 2 cloves garlic, minced
  • 1 cup colby jack cheese, grated
  • 1 cup mozzarella cheese, grated
  • 1 teaspoon salt
  • 1/8 teaspoon pepper
  • 1/8 teaspoon paprika
  • 2 tablespoons extra virgin olive oil
Easy

How to Make Easy Vegetarian Hash Brown Breakfast Casserole

Step 1: Preheat the Oven

Preheat your oven to 400°F. Grease your 9X13 inch baking dish to prevent sticking.

Step 2: Prepare the Hash Browns

Pour the hash browns into the prepared dish. Press them down into an even layer.
– Drizzle evenly with olive oil.
– Sprinkle with salt.

Bake in the preheated oven for about 30 minutes until the edges start to brown. Remove from heat and let cool for 5 minutes.

Step 3: Mix the Egg Mixture

Reduce the oven temperature to 350°F. In a large mixing bowl:
– Whisk together the skim milk and eggs.
– Add in diced bell pepper, yellow onion, green onion, minced garlic, pepper, and paprika.

Step 4: Combine Layers

Sprinkle half of both cheeses over the baked hash browns.
– Pour the egg mixture over the top.
– Sprinkle remaining cheeses on top of everything.

Step 5: Bake Again

Return to the oven and bake for another 30-35 minutes. Check if it’s set in the middle; edges should be bubbling.
– If needed, cover with foil if the top looks too browned but isn’t fully set.

Step 6: Garnish and Serve

Once baked perfectly:
– Garnish with remaining green onion.
– Add a pinch of paprika and some fresh ground black pepper on top. Serve immediately for best flavor!

How to Serve Easy Vegetarian Hash Brown Breakfast Casserole

Serving your Easy Vegetarian Hash Brown Breakfast Casserole can elevate the mealtime experience. Here are some delicious ways to enjoy this hearty dish.

For a Classic Breakfast

  • Fresh Fruit: Serve with a side of seasonal fresh fruit like berries or sliced melon for a refreshing contrast.
  • Toast: Pair it with toasted whole grain or sourdough bread for added texture and fiber.

As a Brunch Delight

  • Mimosas: A glass of mimosa adds a festive touch, making it perfect for brunch gatherings.
  • Coffee: Offer freshly brewed coffee or tea to complement the flavors of the casserole.

With Garnishes

  • Sour Cream: A dollop of sour cream can enhance the creaminess of the casserole.
  • Avocado Slices: Fresh avocado slices add creaminess and healthy fats.

How to Perfect Easy Vegetarian Hash Brown Breakfast Casserole

To ensure your Easy Vegetarian Hash Brown Breakfast Casserole turns out perfectly every time, consider these helpful tips.

  • Bold Preparation: Ensure you grease the baking dish well to prevent sticking.
  • Bold Bake Time: Keep an eye on the baking time; check for doneness by inserting a knife in the center.
  • Bold Cheese Options: Feel free to mix and match cheeses based on your preference for flavor and texture.
  • Bold Veggie Variations: Customize with additional vegetables like spinach or mushrooms for extra nutrition.
  • Bold Storage Tips: Store leftovers in an airtight container in the fridge for up to 5 days, reheating as needed.
  • Bold Serving Temperature: Serve warm for the best taste; it’s equally delicious fresh out of the oven or reheated.
Easy

Best Side Dishes for Easy Vegetarian Hash Brown Breakfast Casserole

Pairing your Easy Vegetarian Hash Brown Breakfast Casserole with complementary side dishes enhances your breakfast experience. Here are some great options.

  1. Mixed Green Salad: A light salad with a vinaigrette balances the richness of the casserole.
  2. Roasted Vegetables: Seasonal roasted vegetables add depth and flavor; think zucchini, bell peppers, or asparagus.
  3. Yogurt Parfait: Layer yogurt with granola and fruit for a creamy and crunchy side that adds freshness.
  4. Baked Beans: Sweet and savory baked beans provide protein and pair nicely with breakfast dishes.
  5. Grilled Tomatoes: Simple grilled tomatoes seasoned with salt and pepper bring brightness to your plate.
  6. Potato Wedges: Crispy potato wedges offer another comforting potato option that kids love.

Common Mistakes to Avoid

When making an Easy Vegetarian Hash Brown Breakfast Casserole, it’s important to follow the recipe closely. Here are some common mistakes to avoid:

  • Ignoring the oven temperature: Preheating your oven is crucial for achieving the perfect texture. Failing to preheat can result in uneven cooking.
  • Overcrowding the casserole: Adding too many ingredients can lead to a soggy casserole. Stick to the ingredient amounts specified in the recipe for the best results.
  • Skipping the cooling time: Letting the hash browns cool for a few minutes after baking helps them firm up before adding the egg mixture. Skipping this step can make layering difficult.
  • Not checking for doneness: Always ensure your casserole is fully set before taking it out of the oven. A toothpick test in the center should come out clean, indicating it’s cooked through.
  • Using low-quality cheese: Cheese enhances flavor and texture. Opt for fresh, high-quality cheeses for a better-tasting dish.

Storage & Reheating Instructions

Refrigerator Storage

  • Store leftovers in an airtight container.
  • The casserole will last up to 3-4 days in the refrigerator.

Freezing Easy Vegetarian Hash Brown Breakfast Casserole

  • Allow the casserole to cool completely.
  • Wrap tightly in plastic wrap or aluminum foil before placing it in a freezer-safe container.
  • It can be frozen for up to 2-3 months.

Reheating Easy Vegetarian Hash Brown Breakfast Casserole

  • Oven: Preheat your oven to 350°F. Place slices on a baking sheet and cover with foil, heating for about 15-20 minutes until warmed through.
  • Microwave: Place individual portions on a microwave-safe plate. Heat on medium power for 1-2 minutes, checking frequently until warm.
  • Stovetop: Heat a non-stick skillet over medium heat. Add slices and cover with a lid, cooking for about 5-7 minutes until hot.
Easy

Frequently Asked Questions

Can I make this Easy Vegetarian Hash Brown Breakfast Casserole ahead of time?

Yes, you can prepare this casserole the night before and refrigerate it until you’re ready to bake it in the morning.

What vegetables can I add to my Easy Vegetarian Hash Brown Breakfast Casserole?

Feel free to customize by adding spinach, mushrooms, or zucchini. These veggies will add flavor and nutrition!

How do I know when my Easy Vegetarian Hash Brown Breakfast Casserole is done?

The casserole is done when it’s puffed up, golden brown on top, and a toothpick inserted into the center comes out clean.

Can I substitute dairy-free options in this Easy Vegetarian Hash Brown Breakfast Casserole?

Absolutely! You can use plant-based milk and dairy-free cheese alternatives if you prefer a dairy-free version.

Final Thoughts

This Easy Vegetarian Hash Brown Breakfast Casserole is not only delicious but also versatile. You can customize it with your favorite vegetables or cheeses, making it a great option for any occasion. Whether you’re serving breakfast or brunch, this dish is sure to please everyone at your table. Give it a try!

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Easy Vegetarian Hash Brown Breakfast Casserole

Easy Vegetarian Hash Brown Breakfast Casserole
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Start your day right with this Easy Vegetarian Hash Brown Breakfast Casserole, a wholesome dish that combines crispy hash browns, fluffy eggs, vibrant vegetables, and melted cheese. Perfect for brunches or busy mornings, this casserole is not only nutritious but also incredibly easy to prepare. You can customize it with your favorite veggies and cheeses, making it a versatile option for any palate. Whether you’re hosting family or need a filling breakfast for yourself, this dish promises to delight with its rich flavors and satisfying textures. Bake it ahead of time for a hassle-free morning or serve it fresh from the oven—either way, it’s sure to be a hit!

  • Author: Amanda
  • Prep Time: 15 minutes
  • Cook Time: 65 minutes
  • Total Time: 1 hour 20 minutes
  • Yield: Serves approximately 8
  • Category: Breakfast
  • Method: Baking
  • Cuisine: Vegetarian

Ingredients

Scale
  • 20 oz hash browns (fresh or frozen)
  • 10 large eggs
  • 1/2 cup skim milk
  • 1 bell pepper (diced)
  • 1/2 cup yellow onion (diced)
  • 1/4 cup green onion (sliced)
  • 2 cloves garlic (minced)
  • 1 cup colby jack cheese (grated)
  • 1 cup mozzarella cheese (grated)
  • Salt and pepper to taste
  • 2 tbsp extra virgin olive oil

Instructions

  1. Preheat your oven to 400°F and grease a 9X13 inch baking dish.
  2. Spread hash browns evenly in the baking dish, drizzle with olive oil, and sprinkle with salt. Bake for about 30 minutes until edges are golden brown.
  3. In a mixing bowl, whisk together eggs and skim milk. Stir in diced bell pepper, yellow onion, green onion, garlic, and seasoning.
  4. Once the hash browns are done baking, lower the oven temperature to 350°F. Layer half of each cheese on top of the hash browns.
  5. Pour the egg mixture over the top and sprinkle with remaining cheese. Bake for an additional 30-35 minutes until set.
  6. Garnish with extra green onion before serving.

Nutrition

  • Serving Size: Approximately 1/8 of casserole (150g)
  • Calories: 250
  • Sugar: 3g
  • Sodium: 540mg
  • Fat: 14g
  • Saturated Fat: 6g
  • Unsaturated Fat: 8g
  • Trans Fat: 0g
  • Carbohydrates: 22g
  • Fiber: 2g
  • Protein: 12g
  • Cholesterol: 220mg

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