don't know if "The Best" but here goes. this will make about 6 or 7 quarts
in large heavy pot brown 2 lb pork neck bone in 2 Tbs canola oil over medium heat. when well browned, remove neck bones. brown 1 large chopped onion, 1 head finely chopped garlic, 1 medium chopped green pepper, 2 medium chopped pablano peppers, 2 ancho peppers, 2 mitchella peppers till onion is clear. return neck bones. add 2 cups chicken stock, 2 cups diced or crushed tomatoes, 1/2 cup red wine, 1 Tbs ground cumin, 1 Tbs mexican oregano, 1 tsp salt. slow simmer for 4 to 6 hours. remove neck bones. when cool enough to handle, remove meat from the neck bones and return the meat to the pot.
soak 2 cups dry pinto in water overnight. drain. cook the soaked pintos with 1 large chopped onion, 1 stalk chopped celery, 1 chopped carrot, in 6 cups veg or chicken stock until tender, remove 1 cup cooked beans, puree and return to pot. combine with neck bones. heat to slow simmer. add fresh peppers to taste, i like a blend of jalapano, serrano, and fresno. add fresh herbs to taste. simmer about an hour.
scott