Broccoli Mushroom Casserole

1 1/2 lb Broccoli

6 tb Butter or margarine

1/4 c Flour

1/2 ts Salt

1/4 ts Black pepper

2 c Milk

1 c Shredded cheddar cheese

1/2 lb Small mushrooms

2 tb Chopped green bell pepper

Additional shredded cheese - (optional) Paprika Separate broccoli stalks and cook in 1 inch boiling salted water 3 to 5 minutes. Drain. Arrange broccoli in greased 9-inch square pan. Melt 5 tablespoons butter and blend in flour, salt and pepper. Cook and stir until smooth. Remove from heat and stir in milk. Bring to boil and boil 1 minute, stirring constantly. Add cheese and remove from heat. Saute mushrooms in remaining 1 tablespoon butter until tender and add to sauce. Add green pepper and cook 1 minute. Pour sauce over broccoli. Sprinkle with additional cheese and paprika, if desired. Bake at 350F 15 to 20 minutes.