3 tbsp. butter
3 tbsp. flour
1 c. milk
1/4 tsp. salt
1/8 tsp. pepper
1/2 lb. (2 1/2 c.) Cheddar cheese, shredded
1 (10 oz.) pkg. frozen chopped broccoli
1/2 c. onion (optional)
3 eggs, separated

Melt butter in saucepan. Stir in flour until smooth. Add milk, salt and pepper. Cook 5 minutes. Add cheese and stir until melted. Stir in partially thawed broccoli and onion. Fold in well beaten egg yolks. Lightly fold in egg whites that have been beaten until stiff. Pour in 2-quart baking dish with straight sides. Bake 35 to 40 minutes at 350 degrees. 6 servings.