Preheat oven to 350°. Brush squash and zucchini with oil; place in a single layer in a jelly-roll pan. Sprinkle with salt and pepper. Bake 5 minutes or until crisp-tender.
Cut mozzarella into 8 (1/4-inch-thick) slices. Cut each slice in half. Place half of zucchini on a serving platter. Layer with half each of mozzarella and basil. Top with yellow squash. Layer with remaining mozzarella, basil, and zucchini. Top with Roasted Red Bell Pepper Sauce. Garnish, if desired.