Melt the butter or margarine in a large saucepan. Stir in the flour and cook for 2 minutes. Slowly whisk in the chicken stock and milk. Bring to a slow boil, reduce heat and simmer until thickened slightly. Remove from heat. Stir in 1 c. cheese and seasonings.
Stir in remaining ingredients, except leftover cheese and tortillas. When combined, pour into a small casserole dish. Top with remaining cheese and bake at 350 degrees for 15-20 minutes, until bubbly and cheese is melted.
Serve with warmed tortillas or chips for dipping.
Notes
You can also spoon the mixture into tortillas and roll up for burritos if you’d prefer.