Preheat oven to 400 In a large skillet, brown the ground beef over medium heat for about 6 minutes.
Add bell pepper and onion. Continue cooking 3-4 minutes or until the beef is no longer pink and vegetables are crisp-tender. Season with salt and black peppers. Place bread shell on baking sheet.
Remove beef and vegetables from skillet with slotted spoon and arrange on top of bread shell. Sprinkle the Mozzarella Cheese on top of beef and vegetable mixture. Bake 8-10 minutes or until the cheese is melted. Cut into 8 wedges and serve hot.