Place the chicken breasts and pepper and onion slices in the bottom of the crockpot.
Pour the salsa over the chicken, ensuring that all the chicken breasts are covered.
Add the chili, cumin, garlic powder, salt, and Pepper.
Cover the crockpot and cook on low heat for 4-6 hours or on high heat for 2-3 hours until the chicken is cooked through and tender.
Once the chicken is cooked, use two forks to shred it directly in the crockpot. Mix the shredded chicken with the salsa sauce.
Allow the shredded chicken to cook for an additional 15-30 minutes in the crockpot, on low heat, to absorb the flavors.
Serve the low-carb salsa chicken hot, garnished with fresh chopped cilantro.