Rice and Beans (Costa Rican)

2 cups long grain rice; cooked
1 cup black beans; cooked
1/2 cup onion; diced
1 clove garlic; minced
3 tsp oil
2 tablespoons coriander (cilantro) ; chopped
Salt

Heat oil in a frying pan on medium heat for a minute. Add chopped onions and saute until they are well browned and translucent. Turn the heat down to medium-low then add the beans and garlic. Cook while stirring occasionally for 8-10 minutes. Add rice and cook for a 3-5 more minutes. When the rice has been added, sprinkle salt until desired taste. Just before serving, top with the coriander and serve!