Colombian Lentils

½ cup lentils

1 ½ cups water

1 small tomato, chopped

1 small onion, chopped

2 teaspoons ground cumin

1 teaspoon salt

1 tablespoon vegetable oil

2 small yellow potatoes, cubed

Combine the lentils, water, tomato, onion, cumin, salt, and vegetable oil in a pot over medium heat; bring to a boil. Cook and stir at a boil until the lentils are soft, about 30 minutes. Add the potatoes and cook until the potatoes are tender, about 15 minutes more.