||Preheat grill or broiler.
||In medium bowl, combine mushrooms, onion, 2 tablespoons oil, salt and pepper and toss until evenly coated.
||Grill or broil sausage, turning occasionally, 15 minutes or until meat thermometer inserted in center registers 165°F; remove and thinly slice.
||Grill vegetable mixture in grill wok or on grill screen, stirring occasionally, until tender. Add tomatoes; grill just until heated through; remove vegetables from grill.
||Brush top side of crust with remaining 1 tablespoon oil. Grill crust, top-side-down, 2 minutes. Turn crust over and top with sliced sausage and vegetables. Sprinkle with mozzarella cheese. Grill, covered, 5 minutes or until pizza is heated through and cheese is melted.