Brussels Sprouts and Grapes Au Gratin

Ingredients

• buttery cooking spray
• 1 pound fresh Brussels sprouts, halved (Quartered if they are large.)
• 1/2 cup seedless red grapes, halved
• 1 Tbsp. light butter
• 2 Tbsp. whole wheat pastry flour
• 3/4 cup fat free milk
• 1/4 tsp. salt
• 1/4 tsp. pepper
• 1/2 cup Swiss cheese, shredded
• 1/2 cup fat free mozzarella cheese, shredded