Fold one third of the egg whites into the cheesecake mixture and then carefully fold in the remainder. Spoon the mixture onto the base then put into the fridge to set for at least 4-6 hours or ...
Whisk the egg whites and salt in a large clean dry bowl until they form soft peaks when the whisk is removed. Slowly whisk in the sugar and continue to whisk until the egg whites are stiff and glossy.