Marvelous Slow Cooker White Beans and Chicken Chili
1 medium white onion, diced1 ½ lbs. boneless skinless chicken pieces (breasts or thighs or combination)3 Poblano chiles, roasted, peeled and diced***1 (7-oz.) can fire-roasted, peeled, diced green chilies, undrained3 T. minced garlic1 lb. Great Northern Beans or Cannellini Beans3…