Instructions

1. Over medium heat, toast the tortillas in a dry pan for about 30 seconds per side, then set them aside.
2. Over medium-high heat, sauté the onion in a dry pan until it turns dark brown. Add a very thin layer of water to the pan, no more than 1⁄8 inch. Stir immediately. Reduce the heat to medium.
3. Add the garlic, sautéeing it for 1 minute.
4. Add the beans and liquid, salt, oregano, and any or all of the optional ingredients you desire. Simmer this for about 5 minutes, adding more water as the liquid cooks out.
5. Puree the beans and simmered ingredients, adding enough water to make a semi-thick sauce.
6. Place a tortilla on a plate and cover it with a quarter of the bean sauce.
7. Place another tortilla on top of this and cover it with another quarter of the bean sauce.
8. Repeat this for a second plate. Add diced tomato to garnish each serving.