Editor's note: Use this salsa to make Deborah Schneider's Tacos of Carnitas Roasted with Orange, Milk, and Pepper .
Tomatillos look like small green tomatoes in sticky, papery husks. In fact, they are relatives of the tomato and are a type of ground cherry. They are native to Central America. Fresh-tasting and excitingly tart, this chunky salsa is great on grilled meat, tostadas, or seafood. It can be made in less than a minute and should be used immediately.