Broccoli, Mushroom, Cheese Casserole

Ingredients

• 1 head cauliflower
• 1 bunch broccoli
• 1 pound Mushrooms sliced
• 1 whole yellow onion diced
• 4 Tablespoons margarine divided
• 3 Tablespoons flour white
• 1/2 teaspoon Salt
• 1/4 teaspoon White pepper
• 1 1/2 cups milk skim
• 1/2 pound cheddar cheese, lowfat grated