Step 1: Preheat the Oven
Preheat your oven to 375°F (190°C) to ensure even cooking.
Step 2: Cook the Ground Beef and Onion
In a large skillet over medium heat, brown the ground beef with the diced onion. Stir occasionally, breaking the meat into crumbles. Season with salt and pepper. Once the meat is fully cooked and the onions are soft, drain any excess grease.
Step 3: Combine Ingredients
In a large mixing bowl, combine the cooked ground beef and onion mixture with the uncooked rice, French onion soup, and cream of mushroom soup. Stir thoroughly to ensure every grain of rice is coated.
Step 4: Assemble the Casserole
Lightly grease a 9×13-inch casserole dish. Transfer the mixture into the dish, spreading it out evenly with a spatula.
Step 5: Bake (Covered)
Cover the casserole dish tightly with aluminum foil to lock in moisture. Bake in the preheated oven for 45 minutes.
Step 6: Add the Cheese
Carefully remove the foil (watch out for steam!). Sprinkle the shredded cheddar cheese evenly over the casserole.
Step 7: Final Bake
Return the dish to the oven, uncovered, and bake for an additional 15 minutes, or until the cheese is melted, golden, and bubbly.
Step 8: Serve and Enjoy
Let the casserole rest for 5 minutes before serving. This allows the flavors to meld and the rice to set. Serve hot and enjoy!
