Even though the exterior of eggplant is a gorgeous deep purple color; the beauty of this vegetable lies on the inside. This recipe takes advantage of the fact that the flesh of grilled eggplant transforms into a luscious creamy sauce that’s perfect for dressing up little tubes of rigatoni. To make the most of summer’s bounty, cherry tomatoes are grilled alongside the eggplant until bursting with juices, then mixed into this summer vegetable pasta.