For the Black Beans:

• 1 lb dried black beans
• 1 smoked ham hock (omit to keep the soup vegetarian)

For the Sofrito:

• 2 tablespoons olive oil (or more as needed)
• 1/2 cup diced onion
• 1/2 cup diced red bell pepper
• 1/2 cup diced green bell pepper
• 4 cloves garlic, minced
• 2 teaspoons ground cumin
• 2 teaspoons dried oregano
• 2 tablespoons red wine vinegar
• 2 teaspoons granulated sugar
• 1 bay leaf
• 1/2 teaspoon salt (or more to taste)
• 1/4 teaspoon black pepper (or more to taste)

For Serving:

• Sliced avocado
• Chopped cilantro
• Sour cream
• Lime wedges