Ratatouille is a Provencal specialty that’s a classic way to use a garden’s summer bounty of eggplant, tomatoes, zucchini and bell pepper. In culinary school, I was taught to saute each vegetable separately, and then simmer them all together. That’s too much work. In this ratatouille recipe, everything is tossed together in one pan and roasted until the vegetables are tender and slightly caramelized. Serve the ratatouille hot, at room temperature or cold as a side dish, tossed with pasta, atop pizza or grilled bread, or even tucked into a quesadilla.