Heat a large pot over medium-high heat. Add the olive oil and turkey. Cook until the turkey is browned.
Add the onion, tomato, and garlic to the turkey and cook for 4 minutes, stirring now and then.
Mix in the oregano, cumin, salt, and jalapeños. Cook for 2 more minutes.
Stir in the citrus juice and zest and cook until a spoon scraped on the bottom of the pot leaves a clear line for at least 1 second.
Stir in the corn, black beans, and sweet potato, then pour in the stock and bring to a boil.
Turn the heat to low, simmer for 20 minutes.
Serve the soup garnished with 1 tablespoon sour cream, 1 teaspoon minced onion, 1 teaspoon chopped cilantro, 1 tablespoon pepper jack cheese, a few drops of hot sauce and tortilla chips.