Rocotos look a little like a small version of a bell pepper. But be careful, these peppers are extremely hot!
Red, green or yellow on the outside they have black seats. They can be found stuffed with a delicious ground beef mixture as "Rocoto Relleno", simply grounded to use as a spice in soups and sauces, as paste or on the table of nearly every restaurant made into a powerful hot sauce used by Peruvians on virtually any food.
Try it if you like hot stuff; you will love it as every Peruvian does.