Grilled Veggie Pizza

Ingredients

• 8 small fresh mushrooms, halved
• 1 small zucchini, cut into 1/4-inch slices
• 1 small sweet yellow pepper, sliced
• 1 small sweet red pepper, sliced
• 1 small onion, sliced
• 1 tablespoon white wine vinegar
• 1 tablespoon water
• 4 teaspoons olive oil, divided
• 2 teaspoons minced fresh basil or 1/2 teaspoon dried basil
• 1/4 teaspoon salt
• 1/4 teaspoon pepper
• 1 prebaked 12-inch thin whole wheat pizza crust
• 1 can (8 ounces) pizza sauce
• 2 small tomatoes, chopped
• 2 cups shredded part-skim mozzarella cheese