Optional flavor boost: Sauté the onion, bell pepper, and jalapeño in olive oil over medium heat for 4–5 minutes until softened. Stir in garlic for 30 seconds. This step adds depth but isn’t required.
Load the slow cooker: Add chicken, sautéed (or raw) aromatics, tomatoes, tomato sauce, chicken broth, corn, black beans, chili powder, cumin, smoked paprika, oregano, salt, and pepper.
Cook low and slow: Cover and cook on Low for 6–7 hours or High for 3–4 hours, until the chicken is cooked through and very tender.
Shred the chicken: Remove chicken to a cutting board and shred with two forks.
Return the chicken to the slow cooker and stir.
Add brightness: Stir in the juice of 1 lime and half the chopped cilantro. Taste and adjust salt, pepper, and lime as needed.
Make tortilla strips: Slice corn tortillas into thin strips. Lightly toss with a drizzle of oil and a pinch of salt.
Toast in a 400°F (200°C) oven for 6–10 minutes, stirring once, until crisp and golden. Or air-fry at 360°F for 4–6 minutes. For a shortcut, use tortilla chips.
Serve: Ladle soup into bowls.
Top with tortilla strips, avocado, cheese, a dollop of sour cream, extra cilantro, and a squeeze of lime. Add hot sauce if you like more heat.