Combine the coriander, cumin, chili powder, salt and pepper. Toss the chicken with the spices. When the chicken is well coated, move it to the slow cooker.
Add the onion, garlic, zucchinis, bell pepper, carrots, tomato paste, chicken broth and salsa.
Cook on low for 4 to 6 hours, or until chicken is cooked through.
Adjust salt and pepper to taste.
Top with garnishes of your choice and serve!