Preheat oven to 375°F. In skillet, heat 1 tb oil over medium heat.
Add onions; saute 10 minutes, or until tender. Add 1 ts thyme,
1/4 ts salt, and 1/4 ts pepper.
Cut each tomato lengthwise into 4 slices. Slice zucchini crosswise
into 1/2" diagonal slices. Arrange tomato, zucchini, and onion
slices in rows across width of 2-1/2 qt shallow baking dish.
In small bowl, combine remaining 3 tb oil, 1/2 ts salt, and 1/4 ts
pepper; mix. Drizzle over vegetables. Cover tightly with foil. Bake
15 minutes; uncover. Bake 30 minutes or until vegetables are
tender; let stand 10 minutes before serving.
* Tian is the name of both a layered vegetable mixture and the
baking dish it's cooked in, Provence, France.
