Tomatoes take on a deeper flavor when roasted. This salsa is particularly good with grilled chicken, fish, or lamb and with tacos or enchiladas.
Prepare a medium-low grill fire, or position an oven rack as close to the heat as possible. Preheat the broiler.
Place on the grill or a foil-lined rimmed baking sheet:
Grill or broil, turning as needed, until the skins are blackened in spots and slightly softened, about 5 minutes on each side on the grill, slightly less time under the broiler. When cool enough to handle, peel and coarsely chop the tomatoes. Put them in a medium bowl and stir in:
Serve immediately or store, refrigerated, for up to 1 week.