– ▢2 15-ounce cans black beans, drained and rinsed (reserve 1/4 cup black bean liquid) – ▢1 teaspoon olive oil – ▢½ medium red onion, chopped – ▢2 garlic cloves, minced – ▢1 teaspoon cumin – ▢½ teaspoon chili powder – ▢½ teaspoon sea salt – ▢¼ teaspoon cayenne pepper – ▢2 Tablespoons tomato paste – ▢2 Tablespoons lime juice – ▢½ Tablespoon apple cider vinegar – ▢2 Tablespoons fresh cilantro, chopped + extra for garnish – ▢yogurt or sour cream for topping, optional