Add 2 layers of foil on the exterior of the spring form pan.
Heat a medium-large pot of water to a boil.
In a stand mixer, beat the cream cheese until fluffy. Add the vanilla and lemon zest.
In a separate bowl, combine 1 & 3/4 cups of the sugar, the flour and salt.
Gradually blend the sugar mixture into the cheese mixture.
Beat in the eggs and egg yolks, one at a time.
Add the cream. Beat well...for about 2 minutes on medium.
Place prepared spring form pan into roasting pan.
Ladle boiling water into the roasting pan, until water reaches about half way up the pan.
Pour the batter into the pan.
Bake for 45 minutes. Then lower the heat to 300F.
Bake for another 30 minutes.
Turn off oven, but leave cake in the oven for 1 hour, leaving the door ajar.
Remove the cake and cool completely on a wire rack
Place cake in fridge, and cool for 6 hours, or overnight.