DIVIDE INGREDIENTS IN HALF. FOR EACH PIZZA, PLACE CRUST ON PIZZA PAN. SPREAD WITH ITALIAN SAUSAGE MIXED WITH PIZZA SAUCE. (BROWN THE SAUSAGE FIRST). COVER WITH MOZZARELLA CHEESE. PLACE PRECOOKED SAUSAGE LINKS ON TOP IN CIRCULAR PATTERN. SPRINKLE WITH SHREDDED JACK CHEESE. BAKE AT 400 DEG F. FOR 15 MINUTES. NOTE: BAKE PIZZA'S ON PREHEATED BAKING SHEET.