Editor's note: Use this salsa to make Deborah Schneider's Mushroom, Rajas, and Corn Taco with Queso Fresco .
A very useful salsa that is easy to make and keeps well. Firm, fresh Roma tomatoes are dry-roasted until soft and well charred on all sides (quemada literally means "burnt"), then pureed into a smooth salsa with sweet toasted garlic, fresh cilantro, and onion. Salsa quemada clings to the dryer and chunkier taco fillings, adding moisture and great flavor. It is also a classic table salsa, perfect to serve with tostadas and totopos.