Nacho Casserole

My friend Ruth Nelson gave me this recipe. I make it with refried beans on half otherwise Kaitlin won't eat it.

1 lb. Hamburger
1 pkg. taco seasoning mix
1 can refried beans (optional)
4 c. shredded cheese (you can use 2 1/2 c. of cheese, but if you like a lot of cheese use 4 cups)
1/2 c. chopped onions (optional)
1 can sliced olives
1 large bag of corn tortilla chips (Doritos Nacho cheese chips are the best)
1 container sour cream
1 container guacamole dip

Preheat oven to 350. Cook hamburger and chopped onions. Drain grease. Add taco mix and refried beans. Put a layer of chips in a 13x9-baking dish. Then a layer of hamburger mix, a layer of cheese, then sprinkle olives over cheese. repeat layers two more times. Put in oven uncovered and bake for 30 minutes. Serve with guacamole dip and sour cream.