Soaky our beans the night before cooking.
If using a slow cooker that has a stovetop setting, use it when assembling the soup or turn your slow cooker on high. If using a Dutch oven, assemble the ingredients on the stovetop over medium heat.
To the bottom of the slow cooker or Dutch oven, add the oil, diced onions, diced pepper, minced garlic, cumin, coriander, salt, and cinnamon. Stir to combine and let the slow cooker or Dutch oven heat up until the onions begin to soften, and the aromatics become fragrant.
Rinse the soaked black beans and add to the slow cooker.
Add the stock and the bay leaves.
Cover your slow cooker, and let the soup cook on low for six hours. If using a Dutch oven, cover and place in a 300-degree oven for 4-6 hours or until the beans are soft.
REMOVE the bay leaves.
Using an immersion blender, pulse the soup to get a creamy/whole bean consistency. Add some of the remaining 2 cups of stock a little at a time until you get the consistency you like.