Preheat oven to 350 degrees.
With a knife, cut out 20 2" x 1.5" rectangles Note: One pie round (Pillsbury refrigerated brand) will make a total of 10 mini Pop Tarts, which is what we made.
Lay 10 rectangles on a parchment lined baking sheet and add one heaping teaspoon of jam in the center.
Lay another rectangle on top of the bottom one. Crimp the edges with a fork. If it's not adhering well, use your fingers and dip in water to help seal.
Take a toothpick and lightly prick the tops.
Crack an egg into a bowl, mix and add a couple of teaspoons of water. Brush on Pop Tarts before baking.
Bake for 10-2 minutes until tops are golden brown.
Allow Pop Tarts to cool completely. Drizzle frosting over the pop tarts evenly and add Valentine sprinkles over them. We like using "cookie icing" so it dries hard like Royal Icing. Of course you can always make your own. Or use other types of frosting - just note it may not dry hard.