Black Beans and Rice

1 T. oil
3/4 c. chopped onions
1/2 c. chopped green pepper
1 c. diced tomatoes
15 oz. can seasoned black beans, drained and rinsed, reserve liquid
1/2 t. thyme
1 t. garlic salt
3 T. cider vinegar
1/2  t. hot sauce (optional)
2 c. cooked rice

Cook onion and peppers in the oil until tender, stir in all other ingredients. Cook 5 more minutes. Serve over rice.