Prepare penne according to package instructions. Do not overcook! Meanwhile, in a large skillet, brown sausage breaking up with the back of a spoon. Season with salt, pepper and red pepper flakes. When sausage is almost cooked add garlic, stirring well for about 2 minutes. Add tomatoes with juice. Add chopped swiss chard, stirring until wilted. Again season with salt and pepper. Add cooked penne and 1 C of mozzarella and stir well. Place in a 9×13 pan and top with remaining cheese. Bake in a 350 degree oven for 30 minutes. Place bread in oven for last 10 minutes.