Crock Pot Cuban Black Beans

1 lb dried black beans
2 quarts water
1 large chopped onion
2 cloves garlic
1/2 cup olive oil

Wash beans, put in crock pot with all ingredients. Cook on high for 6-7 hours - until soft. Turn to low, add 1/2 cup vinegar, cook for 1 more hour.

Serve over rice with garnishes (cheese, onions, sour cream, tomatoes, avocados).