Store leftover bean gravy and cooked white rice in separate airtight glass containers in the refrigerator for up to 4 days. Storing rice separately prevents it from soaking up all the rich gravy and becoming soggy. You can also freeze the bean mixture in freezer bags for up to 3 months. Reheat individual portions in the microwave on HIGH for 2 minutes, stirring halfway through. Alternatively, warm on the stovetop over medium-low heat for 8 to 10 minutes, adding 2 tablespoons of chicken broth or water to loosen the thick gravy. Check for spoilage signs like sour odors or surface film before eating.