This Vegetable Tian with Zucchini and Roasted Corn is bursting with zucchini, roasted corn, fresh tomatoes and underneath it all lies caramelized onions. Vegetable Tian with Zucchini and Roasted Corn is really a take off of Ina Garten’s Vegetable Tian. She uses fewer vegetables than I do, but the method of making the tian is…