1 lb Dried black beans
6 c  Water
4 c  Chicken or vegetable stock
1/4 c  Olive oil
1 lg Onion -- finely chopped
4    To 6 garlic cloves --
Minced
1 1/2 ts Cumin
1 1/2 ts Oregano
2 ts Salt
1 1/2 c  Cooked brown rice
2    To 3 tbsp. red wine vinegar
2 c  Sour cream
4    Green
6    Radishes -- thinly sliced
Lime wedges
Onions -- thinly sliced

Rinse and sort beans, drain well. Place beans and water in a large kettle
and bring to a boil over high heat. Cover, reduce heat; simmer until beans
absorb most of the water, about 30 to 45 minutes. Add stock and continue
simmering, covered, until bean