For Drizzle: Juice of 1 lime; 1 tablespoon olive oil
Instructions
Heat 1 tablespoon of olive oil in a large pot or Dutch oven over medium heat. Add the onion, carrots, and celery. Cook until softened, about 5 to 7 minutes.
Add the minced garlic and chopped red bell pepper. Cook for 2 more minutes until fragrant.
Stir in the cumin, chili powder, smoked paprika, and cayenne pepper (if using). Cook the spices for 1 minute, stirring constantly, to toast them.
Add the rinsed quinoa, vegetable broth, diced tomatoes (with their juice), black beans, and corn to the pot. Stir everything together.
Bring the soup to a boil. Once boiling, reduce the heat to low, cover the pot partially, and simmer for 20 minutes, or until the quinoa is fully cooked and tender.
Stir in the salt and pepper. Taste the soup and adjust seasonings as needed.
While the soup simmers, prepare the lime drizzle: Whisk together the juice of 1 lime and 1 tablespoon of olive oil in a small bowl.
Ladle the hot soup into bowls. Top each serving with fresh cilantro, diced avocado, and a squeeze of fresh lime juice. Drizzle the lime-oil mixture over the top before serving.
Notes
Rinsing the quinoa removes its natural coating, saponin, which can taste bitter.
For a richer flavor, roast the corn separately in a dry skillet until lightly browned before adding it to the soup.
If you prefer a thicker soup, mash about 1/2 cup of the black beans against the side of the pot before adding the broth, or simmer uncovered for the last 5 minutes.
This soup freezes well. Cool completely before storing in airtight containers for up to 3 months.