This recipe epitomizes what a great ceviche should be—crunchy, sweet, savory, tart, and rich all in one bite. Corvina, a type of sea bass, is the most widely used fish in South America for ceviche, and is very forgiving for the novice. Its firm, lean flesh holds up better to acid and is easy to either thinly slice or dice.
The combination of sweet potato and raw marinated fish is common in Peru, although there the potato might be roasted whole, sliced, and served fanned at the edge of a plate of ceviche similar to this crunchy, tart version. As you eat the marinated fish, pull away bites of sweet potato from the edge of the dish and enjoy both components at once. Don't be swayed to leave out the sweet potato garnish—you must try both the tart, firm fish and the potato in the same bite to really understand and savor how they work together. Leftover sweet potatoes make a great side dish for spicy foods.
Aji amarillo: Spicy Peruvian yellow pepper. Most commonly found as a jarred paste in South American markets.
