Black Bean and Cheese Tacos

In a small pot, heat oil over medium. Add onion and garlic and cook until onion is soft and garlic is fragrant, 3 minutes. Add cumin and cook until fragrant, 1 minute. Add beans and 1/2 cup water and simmer until beans are heated through, 3 minutes. Transfer to a food processor and process until smooth. Season to taste with salt and pepper. Serve with tortillas, cheese, avocado, lettuce, and jalapenos.