Prepare rice by stirring together broth and rice in small pan. Bring to a boil and reduce heat to low. Cover and simmer until rice is tender, about 18 minutes. While rice is cooking, prepare black beans. Heat the oil in a small pan. Add garlic and sauté 1 minute. Stir in beans and cumin and simmer for 3 to 5 minutes. To prepare the shrimp, heat together the butter and olive oil in a small pan. Add the shrimp, paprika, oregano, red pepper, cumin and black pepper and cook over medium heat until shrimp are tender, about 6 to 10 minutes, stirring frequently. To serve, spoon rice onto a serving plate and spread it out to a large circle. Spoon black beans into the center and top with the cooked shrimp. Sprinkle with green onion.