Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      small         red onion -- peeled and sliced
                        -- 1/8-inch thick
     1/4  teaspoon      black peppercorns
     1/4  teaspoon      cumin seeds
     1/2  teaspoon      dried oregano -- preferably mexican
   2                    garlic cloves -- peeled and halved
     1/4  teaspoon      salt
     1/3  cup           cider vinegar

Preparation:

Blanch the onion slices in boiling salted water for 45 seconds, then drain and place in a medium sized bowl. Coarse grind the peppercorns and cumin in a mortar or spice grinder, and add to the onions. Add the remaining ingredients plus enough water to barely cover. Stir well and let stand for several hours until the onions turn bright pink. Covered and refrigerated, the onions last several weeks.