1 small onion, finely chopped
1 can (14-1/2 oz.) fat-free reduced-sodium chicken broth
1 pkg. (8 oz.) KRAFT Shredded Italian* Five Cheese with a TOUCH OF PHILADELPHIA, divided
2-1/2 lb. red potatoes (about 8), thinly sliced
2 Tbsp. KRAFT Grated Parmesan Cheese
* Made with quality cheeses crafted in the USA.