Fire House Casserole

1 pound ground beef
1 (8 ounce) container sour cream
1 package Doritos
1 envelope taco seasoning
1 small onion, chopped
1 can crescent rolls
1 (4 ounce) can chiles, chopped
1 package cheese, grated
1/2 cup water

Brown ground beef and onion. Drain.

Spread unbaked crescent rolls over the bottom and 1/2 way up the sides of a 9-inch square ungreased pan, pressing with fingers. Crush a layer of Doritos over the unbaked rolls.

Mix taco seasoning, 1/2 cup water, sour cream and chopped chilies with the browned ground beef and onion mixture. Spread the meat mixture over the crushed Doritos. Top with more crushed Doritos. Bake 15 minutes at 350 degrees F. Top with grated cheese and bake until cheese melts. Serve with chopped lettuce and salsa if desired.