Santa Fe Casserole

1 lb. hamburger
1 pkg taco seasoning
2 c water
2 tsp chicken bouillon
¼ c flour
1 c sour cream
7 oz can diced green chilies
11 oz pkg tortilla chips
2 c grated cheese
½ c sliced green onion

In a skillet, brown meat until crumbly; drain fat. Add spice packet and stir. In a bowl, mix bouillon, flour and water. Add to meat mixture. Bring to a boil to thicken. Stir in sour cream and chilies, mix thoroughly. Place ½ the chips, ½ the meat, ½ the cheese and ½ the onions in a greased 9x13 pan. Layer again with remaining ingredients. Bake at 375* for 20 minutes.