Easy Cheesy Scalloped Potatoes

1 pkg. (8 oz.) PHILADELPHIA Cream Cheese, softened
1/2 cup BREAKSTONE'S or KNUDSEN Sour Cream
1 cup chicken broth
3 lb. red potatoes, thinly sliced (about 12 cups)
1 pkg. (6 oz.) OSCAR MAYER Smoked Ham, chopped
1 pkg. (8 oz.) KRAFT Shredded Cheddar Cheese, divided
1 cup frozen peas

PREHEAT oven to 350°F. Spray 13x9-inch baking dish with cooking spray. Mix cream cheese, sour cream and chicken broth in large bowl until well blended. Add potatoes, ham, 1-3/4 cups of the cheese and peas; stir gently to coat all ingredients.

SPOON into prepared baking dish. Sprinkle with remaining 1/4 cup cheese.

BAKE 1 hour or until heated through and potatoes are tender.