Using an electric mixer, cream together the sugar and the cream cheese until the mixture is light and fluffy.
Add the flour, a pinch of salt, the vanilla the the egg yolks, lightly beaten. Combine the mixture well.
In a separate bowl, beat the egg whites until they just hold stiff peaks and fold them into the cream cheese mixture gently but thoroughly.
Pour the filling into the prepared pan.
Bake the cake in the middle of a preheated oven for 1hour; turn off the oven and let the cake stand in the oven for 30 minutes.
Remove the cake from the oven and let stand till cooled completely in the pan on a rack.
For best results, let the cake cool completely and chill it, covered, overnight. I like to put the cake on a 12 inch round plate and use paper thin lemon slices around the bottom. Enjoy.