Saute the aromatics. Heat the oil in a skillet over medium heat. Add the onion and jalapeno peppers, and saute for 3 to 4 minutes. Add the garlic, salt, cumin, and chili powder and stir for another minute.
Blend it all together. Transfer the sauteed ingredients to a food processor. Add the black beans, cilantro, lime juice, and water. Blend until smooth. Taste and add additional spice to your preference.
Garnish. Place the black bean dip in a serving bowl and garnish with chopped cilantro and cotija cheese, if you'd like.
