01 -
Preheat oven to 375°F. Spray a 9x13 inch baking dish with cooking spray, coating all sides.
02 -
In a large skillet over medium heat, brown ground beef with diced onion and minced garlic, breaking meat apart, until no longer pink, about 5-7 minutes. Season with salt and pepper. Drain excess fat.
03 -
Arrange half the sliced potatoes in a single overlapping layer in the baking dish. Season with half the salt, black pepper, and garlic powder evenly.
04 -
Spread cooked ground beef mixture evenly over the potato layer, covering edges.
05 -
Arrange remaining sliced potatoes over the beef in an overlapping pattern and season with remaining salt, pepper, and garlic powder.
06 -
Whisk cream of mushroom soup, cream of chicken soup, and evaporated milk until smooth. Pour evenly over entire casserole and spread with spatula as needed.
07 -
Sprinkle shredded cheddar cheese evenly over the casserole surface. Cover tightly with aluminum foil sealing edges.
08 -
Bake covered for 1 to 1.5 hours until potatoes can be pierced with a fork.
09 -
Remove foil, sprinkle French fried onions over cheese, and bake uncovered for 5-10 minutes until onions are golden brown.
10 -
Allow casserole to rest 5-10 minutes to set. Cut into squares and serve warm.