Trim chicken livers (To do this remove any white, stringy portions with your fingers or a knife)
Place livers in a medium bowl and cover with water
Squeeze in the juice of 2 lemons or 1/4 cup apple cider vinegar and place in fridge for at least 8-12 hours. This will neutralize some of the strong flavor of the liver
Place beans in a bowl and cover liberally with water - they will expand to more than double their current size. Add 2 tablespoons apple cider vinegar and allow to soak overnight.
The next day:
To make the beans:
Rinse beans and place in a pot. Cover with a few inches of water and bring to a boil. Reduce heat and allow to simmer until tender.
To make the chili:
Warm oil/tallow over medium heat.
Add onions, garlic and liver, mincing liver as finely as possible while you sautee. When the onions are soft and the liver resembles a coarse paste(about 10 minutes), add ground beef and saute until brown.
Once the ground beef is browned, add the tomatoes and spices. If needed, pour in enough water/broth so that the meat is fully submerged.
Bring chili to a boil, then reduce heat to low and simmer for an hour.
* Beef liver can be substituted but it will need to be finely minced before it is sauteed with the onions/garlic. Also, I recommend using no more than 1/2 pound as beef liver has a very strong taste.