Asparagus Supreme - cooking recipe

Ingredients

2 Tbsp. flour
2 tsp. margarine
3/4 c. milk
1 Tbsp. onion, finely chopped
1/2 c. grated Cheddar cheese
1 1/2 c. asparagus, cooked
3 egg yolks, beaten
3 egg whites, stiffly beaten

Preparation

Melt margarine.
Stir in flour.
Add milk slowly and stir until thickened.
Add yolks, cheese and onion; stir until cheese melts.
Fold in asparagus after removing from heat; season to taste.
Fold in egg whites.
Bake in greased 1 quart casserole at 350\u00b0 for 45 minutes.