In a large bowl, mix the first 5 ingredients. Cut ribs into 3-rib portions; sprinkle with salt and pepper. Place half the ribs in a 6-qt. slow cooker; pour half the sauce mixture over ribs. Repeat layers. Cook, covered, on low 6-8 hours or until meat is tender., Remove ribs from slow cooker; keep warm. Strain cooking juices, reserving peaches and vegetables. Skim fat from cooking juices; thicken if desired. Stir in reserved peaches and vegetables; serve with ribs. Sprinkle with green onions.