In a 4 qt sauce pan, melt butter and saute onion and garlic for 2 minutes. Ad rice and continue cooking, stirring until rice turns lightly brown (if using white rice). Stir in the broth, roasted peppers, black beans, cumin and salt. Bring to boil and reduce heat, cover and simmer for approx. 20 minutes or until rice is tender. When done, let the rice stand covered for around 5 minutes, then fluff it up with a fork and serve hot.