1 small red onion, chopped
3 cups ORE-IDA Diced Hash Brown Potatoes
1 can (4 oz.) chopped green chiles, undrained
1 pkg. (8 oz.) KRAFT Mexican Style Shredded Four Cheese with a TOUCH OF PHILADELPHIA, divided
6 large [250 mL] egg whites
1/2 cup BREAKSTONE'S or KNUDSEN Sour Cream