Once the pan is warm, add the two halves of the zucchini, top generously with half the tomato sauce and half the cheese of your choosing and half the roughly chopped basil. Drizzle with olive oil and return the pan to the oven. Cook for about 3 minutes or until the cheese is nice and bubbly, turning halfway through the cook. Remove the zucchini from the pan and set aside. Repeat the cook for the eggplant halves.