1 lb. black beans, washed, soaked overnight
6 c. chicken stock
1 lg. onion, chopped finely
1 tomato, chopped
1 green pepper, chopped finely
1/2 c. cilantro (fresh), chopped
1 tbsp. balsamic or red wine vinegar
1 tbsp. sugar
2 tsp. soy sauce
1 1/2 tsp. oregano
2 garlic cloves, minced
1/2 ham shank (optional)

Place beans which have been soaked in a large heavy pot. Cover with water and simmer for 4 hours. As liquid is reduced add chicken stock. Add remaining ingredients, stir thoroughly and continue simmering for 2 more hours, covered. Add more stock as needed to keep beans covered. Season with salt and serve with sour cream and cilantro sprigs. 6 to 8 servings.