Pastry: Cut flour into shortening, add water, blend til like a pie crust, form on an ungreased cookie sheet into two oblong thin loaves.
Puff: In saucepan, melt butter in water, add flour, cook until mixture forms a ball. Add almond flavoring. Add eggs, one at a time, beating after each addition until smooth and well blended. Spread puff over pastry.
Bake at 180ºC or 60 minutes.
Frosting: Mix powdered sugar, vanilla, almond flavoring and water.
Top all with slivered toasted almonds.