1. In a bowl mix together cilantro, sour cream, chipotle chili and grounded cumin.
2. Add in chili powder, fresh lime juice and salt.
3. Keep the dressing aside.
4. In a large bowl combine lettuce and remaining ingredients.
5. Drizzle the dressing over the salad and toss gently to coat.
6. Serve immediately in a plate.
You can make this spicier if you add a spoonful of the adobo sauce from the can. You may also substitute kidney or pinto beans for the black beans, if you prefer.