Comforting Carnitas Stew

Name: Comforting Carnitas Stew
Ingredients: 1 Tbsp olive oil; 1/2 a medium onion, chopped; 2 cloves garlic, minced; One sweet (red, orange, or yellow) bell pepper, chopped; 1 chipotle in adobo, minced; 2 Tbsp tomato paste; 28 oz can crushed tomatoes; 1 can corn, drained; 1 can black beans, rinsed and drained; 1 can kidney or pinto beans, rinsed and drained; 3 cups beef broth; 1.5 tsp smoked paprika; 2 tsp chili powder; 1/2 tsp oregano; 1 tsp cumin; Sea salt, to taste; Black pepper, to taste; 3 cups leftover cooked pork carnitas