HEAT oven to 375ºF.
CUT bread lengthwise in half. Place, cut sides up, on foil-covered baking sheet.
MIX cream cheese and CHEEZ WHIZ until blended; stir in peppers and garlic. Spread onto bread pieces; top with mozzarella.
BAKE 15 min. or until mozzarella is melted and top is lightly browned.