Original "Philly" Cheesecake

DIRECTIONS

• Combine crumbs and margarine; press onto bottom of 9-inch springform pan.
• Bake at 325 degrees F., 10minutes.
• Combine cream cheese, sugar, juice, peel and vanilla, mixing at medium speed on electric mixer until well blended.
• Add egg yolks, one at a time, mixing well after each addition.
• Beat egg whites until stiff peaks form; fold into cream cheese mixture.
• Pour over crust.
• Bake at 300 degrees F., 45 minutes.
• Loosen cake from rim of pan; cool before removing rim of pan.
• Chill.
• Top with cherry pie filling or fresh fruit, if desired.