Adobo Sauce

3 lg. dried ancho chiles, stems and seeds removed
1 dried Pasilla, stem and seeds removed
1 large onion
2 cloves garlic, chopped
1/2 tsp dried oregano
1/4 tsp ground cumin
1/4 cup veggie oil
1/4 cup distilled white vingegar
1 1/2 tsp sugar

Cover chiles with hot water, let sit for 15 min. Combine chiles, and 1/4
to 1/2 cup of the water they were soaking in, onion, garlic, oregano and
cumin in a blender and puree.  Saute the mixture in oil for 5 min add
vinegar and sugar and bring to a boil.  Reduce heat, simmer until thick
about 5-8 min.

Notes:

I checked my my "whole Chile Pepper Book" and there's a recipe on p. 129
for shrimp in adobo sauce.  The cookbook says that its "a sauce made
with chiles, vinegar, herbs and garlic that is popular in the
Philippines as well as in Mexico"

Erica Wissolik 
From the Chile-Heads Recipe Collection
http://neptune.netimages.com/~chile/recipes.html