Melt butter, add onions and saute about 5 minutes. Add flour and cook till bubbly. Pour milk and broth in gradually, stirring until smooth. Add peppers and tomatoes and stir.
In a large casserole spread a layer of meat, then tortillas or tacos and cheese, repeat until all is used up. Pour sauce over this and sprinkle with cheese over entire casserole.
Bake at 350F degrees for 1/2 an hour our until bubbly. Serve hot.
Serves 6-8
Submitted by: By: Beth