Carrot Casserole - cooking recipe

Ingredients

2 lb. carrots, sliced and cooked
1 stick margarine
1/4 c. flour
1/2 tsp. pepper
1 tsp. salt
1/2 tsp. dry mustard
1 tsp. celery salt
1 small onion, diced
2 c. milk
1/2 lb. Velveeta cheese, cubed

Preparation

Sauce:
Melt margarine.
Add dry ingredients, onion and milk. Cook over low heat until thickened.