Place the fennel, celery, scallions, onion, garlic, and red peppers in the bowl of a food processor and pulse until finely chopped but not pureed. Transfer to a large glass or plastic bowl and stir in the tomatoes, oil, salt, black pepper, tomato juice, lemon juice, and hot sauce, if desired. Cover and refrigerate for at least 2 hours. Serve chilled with the lemon or lime wedges.
