This hot pepper puree is called for in many recipes in this book, especially in the cebiches. I freeze it in very small containers so that it can be easily thawed when needed. The best varieties of peppers to use are hot red or green finger peppers, which can be found in U.S. supermarkets when they are in season. Alternatively, Andean hot red peppers and mirasol (hot yellow) peppers are available frozen or packed in brine in South American groceries. I also like manzano peppers for their wonderful flavor; they can be found seasonally. Jalapenos or serranos also can be used. A good substitute for fresh hot pepper puree is habanero hot sauce.