Enchilada Casserole

This is a favorite recipe of ours.  It has been requested - so I thought I would post it for all.

Enchilada Casserole

1 1/2 lbs. hamburger

1/2 cup chopped onion

1/2 teaspoon salt

1/2 teaspoon pepper

1 (15 oz.) can refried beans

8-10 flour tortillas

4 Tablespoons butter

1/4 cup flour

1/2 teaspoon salt

1/4 teaspoon pepper

2 cups milk

1 (10 oz.) can mild enchilada sauce

1 1/2 cups grated cheddar cheese

Brown hamburger and drain grease off.  Add salt, pepper, onion, and beans.  Place 1/3 cup of mixture in flour tortillas.  Roll up and place seam-side down in 9x13-inch pan.  Prepare sauce by melting butter.  Add flour, salt and pepper.  Slowly add milk and enchilada sauce (like making a white gravy).  Cook, stirring often, until boiling.  Boil for 1 minute.  Remove from heat and add cheese, stir until melted.  Pour over tortillas.  Bake at 350 degrees for 30 minutes.