Bring the water, butter and vanilla to a boil. Add flour.

Stir constantly until it leaves the side of the pot and forms a ball. Remove and cool.

Beat in the 4 eggs, one at a time until smooth.

Drop by T. onto parchment lined cookie sheets and bake at 400 degrees for about 25-30 minutes. LET COOL.

Slice in half and fill with mascarpone whipped cream and canned cherry pie filling.