Bring the warmth of a cozy diner right to your kitchen with this French Onion Ground Beef and Rice Casserole. This hearty, one-dish wonder combines seasoned ground beef, fluffy white rice, creamy French onion soup, and bubbling mozzarella cheese for an unforgettable meal. Perfect for busy weeknights or special occasions, this casserole is easy to prepare and sure to please both kids and adults alike. With its rich flavors and comforting texture, it will quickly become a family favorite. Enjoy it at home or serve it at gatherings—the versatility of this dish makes it an ideal choice for any occasion.