Preheat the oven at 320° F. In a mixer, beat the egg whites and cream of tartar at maximum speed until firm peaks are obtained. Add the vanilla and sugar in the form of rain, beat about 5 minutes until they have a bright color and firm peaks.
Stir in the chopped nuts and the broken crackers (breaking them by hand just before adding them to the mixture works well) then give this mixture just a gentle fold. Pour it into a 9-inch round cake pan or springform pan previously greased and lined with parchment paper.
Bake for 1 hour and cool at room temperature before decorating.
For the icing, beat the cream cheese with the icing sugar and the heavy whipping cream until the mixture is soft without lumps.
Once the cake is cool, add a layer of dulce de leche, cover this with the icing and top it with the fruit of your preference.