Original "Philly" Cheesecake

Directions

1. 1
   Combine crumbs and margarine; press onto bottom of 9-inch springform pan.
2. 2
   Bake at 325 degrees F., 10minutes.
3. 3
   Combine cream cheese, sugar, juice, peel and vanilla, mixing at medium speed on electric mixer until well blended.
4. 4
   Add egg yolks, one at a time, mixing well after each addition.
5. 5
   Beat egg whites until stiff peaks form; fold into cream cheese mixture.
6. 6
   Pour over crust.
7. 7
   Bake at 300 degrees F., 45 minutes.
8. 8
   Loosen cake from rim of pan; cool before removing rim of pan.
9. 9
   Chill.
10. 10
    Top with cherry pie filling or fresh fruit, if desired.