I always have this on the menu when figs are in season towards the end of summer and into autumn. The wafers will keep for a day in a sealed container away from heat and moisture.
To make the Pistachio Wafers, put the sugar and butter into the bowl of an electric mixer and work on medium speed until the mixture is white and creamy, about 10 minutes.
Gradually add the egg whites to the creamed mixture and incorporate, then add the flour and work until the dough just comes together. Stir in the crushed nuts and refrigerate the mixture for 2 h