Broccoli Souffle - Recipes to Warm the Heart

3 tablespoons melted butter
3 tablespoons flour
1 cup milk
1/4 teaspoon salt
1/8 teaspoon pepper
1/2 pound grated cheese
1 (10 oz) package frozen chopped broccoli
1/2 cup finely chopped onion
3 eggs, separated

In saucepan, combine melted butter and flour; blend to smooth paste. Add salt and pepper. Add milk slowly while stirring. Cook for 5 minutes, stirring constantly. Add grated cheese, stir until melted. Fold in partially thawed broccoli and chopped onion. Fold in well beaten egg yolks. When mixture is well blended, fold in stiffly beaten egg whites. Put in buttered 2 quart baking dish. Bake at 350 degrees until puffy and brown, about 40 minutes.