This ratatouille recipe is my version of the terrific French vegetable stew made with fresh tomatoes and lots of summer vegetables. It's very versatile side dish and makes a delicious vegetarian main dish, too.
While this recipe offers a simple approach to ratatouille, consider enhancing depth of flavor by lightly sautéing each vegetable (zucchini, tomatoes, mushrooms, onions, bell pepper) separately before layering. This caramelizes their natural sugars, intensifying taste and preventing a watery final dish. For the eggplant, salting and draining it prior to sautéing removes excess moisture and bitterness. Incorporate fresh herbs like thyme and bay leaf into the skillet with the eggplant, or fresh basil directly into the layers for a more authentic Provençal aroma. The Parmesan cheese, while not traditional, adds a savory, umami note; for a dairy-free or more classic profile, omit it and finish with fresh basil and a drizzle of high-quality olive oil.