Creating the Easy Hamburger Potato Casserole is a smooth process. Just follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Brown the Beef: In a large skillet, heat the olive oil over medium heat. Add the ground beef and diced onion. Cook until the beef is browned and the onions are translucent. Drain excess fat.
3. Season: Stir in garlic powder, salt, and pepper. Mix well to ensure the flavors combine.
4. Combine Soup and Milk: In a separate bowl, mix the cream of mushroom soup with milk until well blended. This will be the creamy base for the casserole.
5. Layer the Ingredients: In a greased 9×13-inch baking dish, layer half of the sliced potatoes on the bottom. Add half of the ground beef mixture on top, then pour half of the soup mixture evenly over it.
6. Repeat Layers: Repeat the layering process with the remaining potatoes, ground beef, and soup mixture. Make sure to end with a layer of potatoes.
7. Top with Cheese: Sprinkle the shredded cheddar cheese generously on top.
8. Bake: Cover the baking dish with aluminum foil and place it in the preheated oven. Bake for 30 minutes. Remove the foil and bake for an additional 20-30 minutes, or until the potatoes are tender and the cheese is bubbling.
9. Cool Slightly: Once baked, allow the casserole to cool for 5-10 minutes before serving. This helps the layers to set.

By following these steps, you’ll create a delicious Easy Hamburger Potato Casserole that is bound to impress.