Doritos Surprise

2 cans Ro*Tel tomatoes
2 cans mushroom soup
1 (7 1/2 ounce) bag nacho cheese flavored Doritos
1/2 pound American cheese, grated
1 1/2 pounds ground beef
1 medium onion, grated
1/2 teaspoon salt
1/2 teaspoon garlic salt
1 teaspoon chili powder

Fry onion and beef. Drain off fat; add seasoning. Spread 1/2 of Doritos in a 13 x 9-inch baking pan. Add half hamburger mixture over Doritos. Add 1 can Ro*Tel tomatoes. Add 1 can mushroom soup. Add half of cheese. Repeat layers.

Bake covered for 30-45 minutes at 350 degrees F.