Preheat oven to 375* F. In a medium bowl, combine the strawberries, sugar, cornstarch, grapefruit juice, and grapefruit zest. Mix until the cornstarch is dissolved.

Roll out 2 pie crusts to 9 inches each. Place 1/2 the strawberry filling in the middle of each pie crust.

Place a few slices of grapefruit on top. Working one at a time, fold the edges of the pie crust around the center.

Brush the edges with the egg wash and sprinkle with the sanding sugar.

Bake for 45-50 minutes or until the edges are golden brown and the juices are bubbly.