In a small saucepan melt butter or margarine. Stir in flour and pepper. Stir in milk all at once. Cook and stir over medium heat till thickened and bubbly. Cook and stir 1 minute more. Cut one head of broccoli up and put in a microwave safe bowl with 1 tablespoon of water and warm up for 1 minute. Add ¾ cup of cheese, stir, and serve over warm broccoli. Makes ¾ cup.