1. Place all ingredients, except the oil, in a blender. Blend them perfectly.
2. In a skillet over medium heat put oil and when it is hot add the blended mixture.
3. Cook for 10 to 15 minutes stirring constantly until obtaining the consistency of your preference. You can add 1/2 cup of water if you want the beans to be thinner.
4. Serve the beans with tortillas, sour cream, cheese and fried yellow plantains.