Cheesy Chicken and Vegetable Bake

1 pkg. (6 oz.) STOVE TOP Stuffing Mix for Chicken , divided

1-1/2 lb. boneless skinless chicken breast s, cut into bite-size pieces

1 cup hot water

1 can (10-3/4 oz.) fat-free low-sodium condensed cream of chicken soup

1/3 cup BREAKSTONE'S Reduced Fat or KNUDSEN Light Sour Cream

1-1/4 cups KRAFT 2% Milk Shredded Mild Cheddar Cheese

1 pkg. (16 oz.) frozen broccoli, cauliflower and carrot blend , thawed, drained

What You Need