Creating Beef and Potato Casserole is simple and straightforward. Follow these steps to ensure a successful dish:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C).
2. Brown the Beef: In a skillet over medium heat, brown the ground beef with diced onion until the beef is no longer pink. Drain excess fat if necessary.
3. Season the Beef: Add garlic powder, onion powder, salt, and pepper to the beef mixture, stirring until well combined.
4. Layer the Dish: In a greased casserole dish, start layering with half of the sliced potatoes.
5. Add Beef Mixture: Spread the browned beef mixture evenly over the sliced potatoes.
6. Add Remaining Potatoes: Layer the remaining potato slices over the beef.
7. Prepare Sauce: In a bowl, whisk together the cream of mushroom soup and milk until smooth. Pour this mixture over the layered potatoes and beef.
8. Top with Cheese: Sprinkle the shredded cheddar cheese atop the casserole evenly.
9. Cover and Bake: Cover the dish with aluminum foil and place it in the preheated oven. Bake for 45 minutes.
10. Uncover and Continue Baking: Remove the foil and continue baking for an additional 15 minutes or until the top is golden brown and potatoes are tender.
11. Cool Before Serving: Once cooked, let the casserole cool for about 10 minutes to set before serving.

Following these simple steps will lead you to an amazing dish that you can share with family and friends!