Combine the 4 14 oz cans of black beans, 4 cups chicken or vegetable broth, 1 15 oz can of pumpkin puree, ½ cup orange juice, 1 onion , 1 green pepper, 4 garlic cloves, 2 to 3 chipotle peppers in adobo sauce, 1 tablespoon cumin, 3 teaspoons dried oregano, 2 ½ teaspoons kosher salt, and 1 teaspoon cinnamonin your slow cooker.
Sprinkle 3 lbs boneless pork shoulder with salt and pepper making sure to season all sides.
Warm 2 tablespoons canola or vegetable oil in a large skillet over medium-high heat and cook the pork, turning with tongs, until brown on all sides, about 8 to 10 minutes.
Place pork in the slow cooker. Cover and cook on low for 6-8 hours until the pork is tender and shreds easily. If you are in a hurry you can cook on high for 3-4 hours, but I think the pork shoulder has a better texture when it is cooked low and slow. Taste and adjust seasonings, if necessary.
Shred pork and stir into the bean mixture. Pour any stray juices back into the stew.
Serve over optional cooked rice and garnish with cilantro and green onions.