Put all ingredients in a dutch oven, an electric crockery cooker, or a heavy kettle.
Cover and simmer about 5 hours, or until the roast falls apart and the beans are done.
Uncover and cook about 1/2 hour, until the desired thickness is achieved.
NOTES: A Mexican meat and bean dish, similar to chili. While not a true chili, chalupa is a Mexican-American favorite for a hearty lunch or supper. It may be made ahead and reheated, and it freezes well.
This recipe may be served with corn chips and condiments including chopped tomato, chopped avocado, chopped onion, shredded lettuce, grated cheddar cheese and hot sauce.