Wikipedia explains us the origin of this well known dish.  Thus, Copy Paste : The word ratatouille derives from the Occitan ratatolha and is related to the French ratouiller and tatouiller, expressive forms of the verb touiller, meaning “to stir up”. From the late 18th century, in French, it merely indicated a coarse stew. The modern ratatouille – tomatoes as a foundation for sautéed garlic, onions, zucchini, eggplant, bell peppers, marjoram, fennel and basil, or bay leaf and thyme, or … More Ratatouille