Looking for a bigger slice of the sandwich market, Kraft Pizza Co., Glenview, Ill., has introduced two new lines of microwaveable flatbread melts under its popular DiGiorno and California Pizza Kitchen (CPK) brands. New DiGiorno offerings are Chicken Parmesan, Italian-Style Meatball & Four Cheese, Chicken & Bacon Ranch and Steak & Fire Roasted Vegetables. Each 6-ounce sandwich has about 450 calories. New CPK flatbread melts (at 400 calories each) are Chicken & Bacon Club, Chicken Santa Fe, Five Cheese & Spinach and Carne Asada.