Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1       tb           Oil
     1/4   c            Onion, minced
   1       tb           Garlic, chopped
   3                    Chiles, serranos, minced
  28       oz           Tomatoes, canned
   2                    Bay leaf, dried
     1/8   ts           Thyme
     1/2   ts           Chile, ground, red, new mexi
   1       tb           Vinegar
   1       t            Pepper, black, freshly groun

Preparation:

1) Heat oil in a skillet and saute onions and garlic until soft but not brown. Add minced chiles and saute another couple of minutes. 2) Add tomatoes, bay leaves, thyme and chile and simmer, covered, for 30 minutes, stirring occasionally. 3) Pass half to two thirds of the mixture through a food mill back into the same skillet. Discard solids. Increase heat and reduce to desired consistency. Add vinegar and black pepper. Taste for salt and adjust seasonings. Refrigerate until used.