4      cans          Black Beans -- undrained
   2      cans          Tomatoes, Canned -- whole, undrained
   1      large         Onion -- finely chopped
   2      cloves        Garlic -- or more, to taste
   2      Tbsp          Green Peppercorns -- in brine*
   2      tsp           Ground Cumin
Cook beans, tomatoes, and onion in crockpot on low all day, until onion is 
done.  Add garlic, green peppercorns, and cumin 1/2 hour before serving.