I'm going to a pool party today with some very old and dear friends from college. I'm taking this, with some chips.
2 can black beans (or the equivalent amount of dried beans, soaked and cooked)
2 tablespoons minced onion
2 garlic cloves, peeled
juice of 1 lime
1 jalapeno, chopped
1/2 teaspoon each cumin, chili powder, and oregano
salt and pepper
Puree everything together in your food processor, and adjust the seasonings.