Known as Kuru Fasulye in Turkey, this is the ultimate winter comfort food.
Rinse beans and drain. Soak the beans in water to cover 12-24 hours. Drain.
Dice the onions and green bell pepper. In a large soup pot, heat butter and/or oil over medium heat. Cook onions and pepper in the butter until onions are golden. Add the meat to the pan and brown it. Add the soaked beans, pepper puree, and salt. Add water or stock until it just covers the beans.
Bring to a boil, cover and lower heat to a simmer. Cook until beans become tender. Dice tomato, adding to pot after beans are soft.