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.