russet potatoes, cut into chunks • 32oz carton chicken broth or water • white onion, chopped • minced garlic, approx 2 cloves • Chicken Breasts, approx 2.5lbs, cubed • 12oz can evaporated lowfat 2% milk • sour cream • butter or margarine • salt • black pepper • cayenne pepper (opt) • cajun seasoning (opt) •