How can I cook ratatouille?
How can I cook ratatouille? Preheat the oven for 375˚F (190˚C). Slice the eggplant, tomatoes, squash, and zucchini into approximately ¹⁄₁₆-inch (1-mm) rounds, then set aside. Make the sauce: Heat the olive oil in a 12-inch (30-cm) oven-safe pan over medium-high heat. Sauté the onion, garlic, and bell peppers until soft, about 10 minutes.