Optional sauté for extra flavor: In a skillet, warm olive oil over medium heat.
Sauté onion and bell pepper for 3–4 minutes until slightly softened. Add garlic and cook 30 seconds. Transfer to the slow cooker.
Layer the base: Add diced tomatoes, tomato sauce, beans, green chiles, and chicken broth to the slow cooker.
Stir in chili powder, cumin, smoked paprika, oregano, coriander, salt, and pepper.
Add the chicken: Nestle the chicken breasts (or thighs) into the mixture, making sure they’re mostly submerged.
Cook low and slow: Cover and cook on Low for 6–7 hours or on High for 3–4 hours, until the chicken is tender and shreds easily.
Shred and finish: Remove chicken to a cutting board and shred with two forks. Return the chicken to the slow cooker. Stir in lime juice and adjust seasoning with more salt or chili powder if needed.
Serve: Ladle into bowls and top with cheese, avocado, cilantro, sour cream, and a squeeze of extra lime if you like.
Add chips for crunch.