Place dry black beans in a large pot of water on the stove. Allow to soak overnight.
Drain and rinse beans. Place beans in crock-pot. Add about 4 cups of water, just enough to cover.
In a small skillet, heat olive oil over medium heat. Add Bell pepper, onion, and garlic. Saute until onion is translucent. Add to beans in pot.
Take a whole tomato and cut it into quarters and place it in the crock pot with the beans.
Add your seasonings; Bay leaf, Oregano, Salt, balsamic vinegar and a dash of pepper. Place lid on beans and leave in a crock-pot on low for 8-10 hours.