Cuban Black Beans

2 cans black beans, washed
1 tablespoons olive oil
1/2 large onion, chopped
1/2 medium green bell pepper, chopped
3 cloves garlic, peeled and minced
3/4 cups water
1/2 (6 ounce) can tomato paste
1-1/2 teaspoons vinegar
1 teaspoon salt
1/2 teaspoon white sugar
1/2 teaspoon black pepper

Heat oil in a medium saucepan over medium heat, and saute onion, green bell pepper, and garlic until tender.

Into the onion mixture, stir the drained beans, water, tomato paste, pimentos, and vinegar. Season with salt, sugar, and pepper. Bring to a boil. Cover, reduce heat, and simmer 1/2 hours, stirring occasionally, until beans are tender.