preheat oven to 350

brown the ground beef (you can add salt and pepper or onions)

mix the cans of rotel and cream of mushroom in a bowl

add a layer of doritos at the bottom of the casserole dish

add a layer of beef

add a layer of the rotel and cream of mushroom

continue layering in that order till everything is gone or the dish is full

sprinkle cheese over the top

put in oven for 10 to 15 minutes