Preheat oven to 400 degrees.
Line a baking sheet with parchment paper or a silpat mat and set aside.
Lay the pie dough out on a lightly floured surface.
Use a heart shaped cookie cutter to cut out pieces, using up all of the pie dough. You can re-roll pie dough scraps together to get even more pieces.
Place 8 hearts, evenly spaced, on the lined baking sheet.
Spoon ½-1 teaspoon (depending on the size of the hearts) of raspberry filling in the center of each heart.
Place a second heart on top, then gently press along the edges to seal the filling in.
Brush with the whisked egg.
Bake for 11-13 minutes, or until golden brown. Remove to a baking rack and allow to cool.
Once the pop-tarts are cool and ready to be decorated, make the white chocolate glaze.