Heat oven to 375ºF.
Beat egg whites in medium bowl with mixer on high speed until stiff peaks form. Beat cream cheese spread in large bowl with mixer until creamy. Add egg yolks; beat until well blended. Gently stir in egg whites until well blended.
Pour into 1-1/2-qt. baking dish sprayed with cooking spray.
Bake 24 to 26 min. or until top is puffed and golden brown.