Heat the olive oil in a large pot or Dutch oven over medium-high heat. Add the tomatoes, onion, and pepper. Sauté for 10 minutes until the onions are translucent and the vegetables are soft are tender.
Add the garlic, kosher salt, dried oregano, cumin, chili powder, and black pepper. Stir and cook until fragrant, about 1 minute.
Stir in the black beans and vegetable broth. Bring to a boil, reduce heat to low, cover, and simmer for 15 minutes.
Carefully transfer 2 cups of the soup to a large blender. Pulse 4 to 6 times until mostly smooth, then add it back into the pot. You can also use an immersion blender straight into the pot and blend until it reaches your desired consistency.
Cook for an additional 5-7 minutes uncovered until the soup has thickened.
Serve in bowls top with diced avocados, queso fresco, cilantro, lime juice, and sour cream.
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Notes
To make using dried beans, you'll need 1 ½ cups dried beans, or about about 4 ½ cups cooked. Cook them according to package instructions and use as directed. I love making these Instant Pot black beans to use in dishes like this soup!
Add some smoky flavors. This recipe is simple and flavorful as is, but you can easily bring it up a notch by adding smoked paprika or chopped chipotles in adobo for a smoky and spicy twist.
Add extra protein. You can add shredded chicken or ground beef to the soup to make it more hearty. Leftover carnitas, barbacoa, and even birria are delicious mixed into this soup as well!