Warm the pot: Heat the olive oil in a large pot or Dutch oven over medium heat.
Add onion and bell pepper. Sauté 4–5 minutes until softened.
Add garlic and turkey: Stir in garlic for 30 seconds. Add ground turkey and cook, breaking it into crumbles, until no longer pink, about 5–7 minutes.
Season generously: Sprinkle in chili powder, cumin, smoked paprika, oregano, coriander (if using), salt, and black pepper.
Stir and cook 1 minute to bloom the spices.
Build the soup base: Add green chiles, black beans, pinto beans, corn, diced tomatoes, broth, and tomato paste. Stir well to dissolve the paste.
Simmer: Bring to a boil, then reduce to a gentle simmer. Cook uncovered for 15–20 minutes, stirring occasionally, until flavors meld.
Finish with lime: Stir in lime juice.
Taste and adjust seasoning with more salt, pepper, or spices as needed.
Serve and top: Ladle into bowls and top with cilantro and your favorite garnishes. Keep toppings light to maintain the low-calorie profile.