We love love ceviche! Peruvian ceviche is traditionally made with lime juice, garlic, aji, cilantro, and onion, but nowadays chefs are getting more and more creative with their ingredients. There is a strong Japanese culinary undercurrent in Peruvian cooking, because of the small, but important population that arrived in Peru in the late 19th/early 20th century. Peanuts originate in the Andes region, and add a healthy crunch to the dish.