Place soaked beans in a heavy bottom stock pot. Add about ½ pound of bacon and a large onion that has been peeled and cut into quarters. Add enough water to cover the beans by about 1 inch. Bring to a boil. Reduce heat to a high simmer or low boil. Stir often to prevent burning on the bottom of the pot. Add water to keep beans just barely covered. Cook until beans are tender (about 3 ½ hours). Add salt and pepper to taste.
Tepary beans will take a little longer than pinto beans to cook.
Condiments such as : salsa, shredded cheese, chopped onions, cilantro, vinegar can be added to the beans as a garnish on the plate for added texture and flavor.
The cooked beans can be refried or mashed and used in burritos, tostadas, and other Mexican food dishes. A great bean dip can be made by adding salsa and shredded cheese to the mashed/ refried tepary beans.

