Add wafers and pine nuts to food processor, pulse until well ground up. Pour into bowl and add melted butter. Mix by hand, with a wooden spoon, and press into 10-inch tart pan. (reserve 4 tablespoons of crumbs to sprinkle on top when done baking.)
Place tart pan in the oven and bake for 8 minutes.
For the filling:
In a mixing bowl add egg whites and sugar, beat until there are soft peaks.
In another mixing bowl, add remaining ingredients and mix thoroughly. Fold in the egg whites. Pour into tart shell and bake for 25 minutes. Remove from oven and sprinkle with reserved crumbs. Let cool before cutting and serve with fresh whipped cream.