Oil a large, shallow baking dish (about 10 by 15 inches). Lay half of the eggplant in the dish and spread one-fourth of the tomatoes on top. Scatter with half of the feta and basil. Layer half of the zucchini on top, followed by another one-fourth of the tomato and the remaining basil, eggplant and zucchini. Top with the remaining tomato and feta. Mix the <em>panko</em> with the remaining 1 tablespoon of oil and sprinkle over the casserole. Bake in the upper third of the oven for 20 minutes, until bubbling and crisp. Let stand for 5 minutes, then serve hot or warm.