Enchailada or Frito Casserole

Enchilada or Frito casserole

1 can chili
1 18 oz bag of Frito's ( I have to buy two smaller bags cause that is usually all I can find)
1 8oz can tomato sauce
1 1/2 cup sour cream
2 cups grated cheese
1 15 oz can of enchilada sauce
2 tlbs grated onion
set sour cream and 1/2 cup cheese and 1/3 of the Frito's aside.Crumble the remaining Frito's (if you do the two bags like me then it is just one whole bag) mix with all remaining ingredients except topping and put in a 8 1/2 x 11 inch casserole dish and bake at 375 for 20 min. remove casserole from oven , spread on sour cream cover with Frito's and sprinkle with cheese bake for 5 more min. and serve. you can add a little more sour cream when you serve it if you want