In a glass bowl, mix the salsa and the horseradish together. (If you are using bottled cocktail sauce, add the juice of 1 lime.) Place a teaspoon of the salsa in the bottom of each of 8 chilled shot glasses, top with an oyster, and spoon another tablespoon of the sauce on the top. Serve at once.
c.1997, M.S. Milliken & S. Feniger, all rights reserved