Bring several cups of water to a rolling boil and add the beans, a few at a time to keep the water at a rapid boil. After all the beans have been added, reduce the heat slightly to maintain a steady simmer. Cook the beans for 30–40 minutes, or until tender but not mushy, adding more water if necessary to keep the beans covered all the time. Drain the cooked beans.
In a large saucepan, c