French Onion Beef and Rice Casserole is a comforting, one-dish meal that combines tender ground beef, fluffy rice, and sweet caramelized onions in a rich French onion sauce. Topped with gooey melted cheese, this casserole is perfect for cozy family dinners or gatherings with friends. Quick to prepare and bursting with flavor, it’s bound to become a cherished favorite that leaves everyone asking for seconds.