Purée of Black Beans with Sour Cream

Pick over and wash the beans. Boil the beans in the water for two minutes. Remove from the heat, cover, and let stand for one to two hours.

Sauté until wilted the onion, pepper and garlic in the olive oil. Add to beans.

Add bay leaf and salt and pepper and cook, covered, for about two hours, until the beans are tender. Add water a