Deme'S Cheesecake!!

Directions

1. 1
   Blend Ricotta and cream cheese well in a very large bowl. Blend in sugar.
2. 2
   Beat in eggs, one at a time.
3. 3
   Add vanilla, lemon juice, cornstarch, flour and butter.
4. 4
   Fold in sour cream; blend well.
5. 5
   Pour into a 10-inch buttered spring-form pan.
6. 6
   Place in cold oven; turn heat to 325°.
7. 7
   Bake for 1 hour; do not open oven door!
8. 8
   (After 1 hour, I very carefully peek in to see if the cake has set; if not, I let it cook for another 1/2 to 3/4 hour longer, watching that it does not scorch in the pan.)
9. 9
   Turn off oven; leave until cool, at least 2 more hours.
10. 10
    Put any filling you wish over the top and enjoy!