#1 Heat oven to 400°F #2 Whisk heavy cream, flour, garlic and pepper in medium bowl until combined. Stir in milk and chives #3 Place half the potatoes in 3-qt baking dish sprayed with cooking spray layer with half each of the milk mixture, mozzarella cheese and Parmesan cheese. Repeat layers cover #4 Bake 50 min. or until potatoes are tender, uncovering for the last 20 min #5 Let stand 10 to 15 min. before cutting to serve.