The main ingredients of ratatouille are tomatoes, onions, peppers, zucchini & this veggie that's bigger than those
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Add the onion, celery root, carrot, and garlic, and saut until the .... Group 2
Kale, collards, mushrooms, peppers, zucchini, summer ... Ratatouille ... A 
versatile summer recipe that can be used as a side dish, main dish or salad.