Black Bean Tortilla Soup

Heat oil in a Dutch oven over medium heat. Saute onion and garlic for 3-5 minutes. Add cumin, chili powder and chipotle seasoning and cook for another minute. Add broth and bring to a boil. If using water, bring to a boil and then add the vegetable base (around a tablespoonfl, depending on your taste and the strength of your base). Reduce heat to medium-low and add black beans, diced tomatoes, and corn. Simmer covered for 10 minutes. Using an immersion blender, blend the soup until fairly smooth. Pour into bowls and serve with avocado, tortilla chips, sour cream and salsa for everyone to add to their soup as desired.