Drain and rinse the beans. Heat the oil in a large skillet over high heat. Add the onions and cook until slightly browned. Add bell peppers and greens, cook 5 minutes. Add garlic, jalapeños, and beans and cook for 2 minutes. Add the stock, lime juice, Cajun seasoning, chili powder, cumin and cilantro. Bring to a boil, lower the heat, and simmer for 15-20 minutes, or until the beans and vegetables are tender. Add salt and pepper to taste. Serve with toppings such as fresh chopped cilantro, bell or hot peppers, tomatoes, onions, avocado, and lime wedges for squeezing.