Fresh Tomato Salsa
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1/2 pound plum tomatoes
2 fresh serrano chilies
1/2 cup finely chopped white onion
1/4 cup chopped fresh coriander leaves
1 teaspoon coarse salt, or to taste
3 tablespoons fresh lime juice

Cut tomatoes in half crosswise and seed if desired. Finely chop
tomatoes and transfer with any juices to a bowl. Wearing rubber
gloves, finely chop chilies, including seeds. Stir chilies into
tomatoes with remaining ingredients. Salsa may be made 6 hours
ahead and chilled, covered.