1/4 cup olive oil 1/2 yellow onion, peeled and chopped 2 pounds roma tomatoes 4 tsp. minced garlic 1/2 cup minced cilantro 4 canned chipolte chilies en adobo, chopped 1/4 red wine vinegar 1 TBS salt 1 TBS sugar * Heat oil in a pan over medium heat until hot. Add onion and saute til it caramelizes, about 10 minutes. Put onion, garlic and half of the tomatoes into a blender and pulse until finely chopped, but not pureed. Add cilantro and chipolte chilies. Pulse again to mix. Put in a bowl. * Chop remaining tomatoes and add to bowl. Mix in olive oil, vinegar, salt and sugar. * Smokey hot and great with chips or on tamales.