Since I knew that these wouldn't last long enough to attempt to stick in a toaster (I wouldn't put them in a toaster anyway, since I'd be too paranoid that the jam would drip out and start a fire, but that's just me. Seems like if they are pop tarts you should be able to toast them), I just made them round, since that was the most convenient cutter shape for me to grab and I didn't want to freestyle cut rectangles with a knife, knowing full well that I would never manage to make them the same size and shape that way!
This time, we didn't let them cool long enough to frost, but it would be easy to make a quick glaze of powdered sugar with just enough milk to make it spreadable to frost them in the future.
powdered sugar (optional)
Preheat oven to 450. Roll out pie crust and cut into desired shapes. Dollop about a teaspoon of jam on half of the shapes. Cover jam with the shapes that are left and press edges together to seal. Place on baking sheet and bake for 10-15 minutes or until light golden brown. Cool completely before frosting. To frost, put some powdered sugar in a small bowl and add just enough milk to make spreadable. Let frosting set before serving.