Adapted from the P90X Nutrition Guide to be oil-free and to start from 1 lb each of the dried beans for bulk cooking in a slow cooker.

3 onions, diced
3 Tbsp fat-free low-sodium vegetable base
36 oz canned tomato paste
6 jalapeños
4 Tbsp cumin
1 lb dried black beans
1 lb dried navy beans
Water

1. Rinse, clean, and soak beans overnight. (If you forgot, bring beans to a boil for about 10 minutes in a pot on the stove.)
2. Discard soaking water, then combine all ingredients in the slow cooker. Add enough water to cover beans by about 1 in.
3. Cook on high for 4 hours.