Roast tomatoes, onions and chiles, adding garlic at the last ( do not blacken) Crush tomatoes and place in Molcajeta. Rough chop onion. Grind tomatoes, adding onion, garlic and chiles as you go to make a rustic paste (some texture is good). Add sea salt to taste and stir in chopped cilantro at the last. Serve immediately. Alternately, blend briefly, into a rustic sauce (leave plenty of texture) If making a sauce at the end add about 1 Tablespoon oil to pan and add mixture to oil cook about 10 mins.