Turn the oven heat down to 300°F.
Beat the cream cheese until light and fluffy.
Add egg yolks and beat until very smooth.
Gradually add ¾ cup of the sugar and the flour.
Stir in the sour cream, lemon rind, lemon juice, and vanilla. Set the mixture aside.
In a separate bowl, whisk the egg whites until foamy.
Add in the remaining ¼ cup of sugar and whisk until stiff peaks form.
Gently fold the egg whites into the cream cheese mixture.
Pour the mixture into the pan on top of the pre-baked crust. Evenly smooth out the top of the batter.
Bake for 70 minutes, making sure to NOT open the oven door during this time.
Turn off the oven and let the cake cool inside with the door slightly open. About 1 hour. There may be cracks on top, that's ok!
Once completely cooled, transfer to the fridge and chill for at least 8 hours.
Top the cake with cherry pie filling and enjoy!