From the RSVP section of an old Bon Appetit Magazine. Recipe is courtesy of C Lazy U Ranch in Colorado. Can be made 1 day ahead and refrigerated.
Prep time does not include overnight soaking time for beans.
Place pinto beans in heavy large pot. Add enough water to pot to cover beans by 3 inches; let soak overnight. Drain beans. Return beans to pot. Add 5 cups water, chopped onion, garlic and bay leaf and bring to a boil. Boil until beans are just tender, stirring occasionally, about 55 minutes. Stir in remaining ingredients and simmer until beans are very tender and flavors blend, about 30 minutes. Season to taste with salt and pepper and serve.