Alessandra's almond tart

Alessandra's "torta di cinque minuti" or  almond tart

Mix for five minutes -- 1 stick sweet butter, 1 cup sugar, 1 egg, 1 cup ground almonds (either blanched or unblanched), 1.25 teaspoons almond extract or a shot glass of cognac, 1 scant cup of flour.
Place mixture in a buttered and floured cake tin (or glass pan), sprinkle the top with slivered almonds and bake for 25 minutes at 325 degrees until nicely brown. Cool completely before unmolding or cutting the cake.

Two other things: this cake is good using only ground almonds and is a gluten free alternative.
Also-- Alessandra often prepared her torta without almonds on top. Rather, she baked it and cooled it and dusted the top with powdered sugar.