Preheat oven to 400º Fahrenheit. Unroll pie crusts and smooth until flattened. Line a baking sheet with parchment paper or a Silpat baking liner.
Cut rolled pie crust into 3 x 4.5” strips or into 3"to 4" hearts using heart shaped cutters. Place 1½ tablespoons of jam in the middle of half of the pastries. These will be the bottom of the pop-tarts. For the tops (without jam), use a fork to poke venting holes in the center.
Using a pastry brush (or your finger) brush water around the edges of each pastry. Gently place the top pastries on the bottom pastries, aligning them. Carefully run your finger around the edges to seal them, then crimp the edges with a fork. Mix 1 tablespoon of egg white with 1 tablespoon of water. Brush over the top of the pastries.
Bake at 400º Fahrenheit for 15 minutes, or until golden. Let cool on a wire rack for 15 minutes before frosting.
Frosting
Mix confectioners sugar with heavy cream, until smooth and creamy. Add 1 drop of food coloring to tint the frosting. I used 1 drop of red for pink frosting. Frost or drizzle over pastries before serving.
Notes
Hand pies will keep well for up to 2 days on the counter at room temperature in an airtight container. For longer storage they can be kept in the fridge for up to 4 days, but I recommend microwaving on a paper towel for about 15 seconds or so before enjoying.These Valentine's Day pop tarts are also great for freezing! Let them cool completely before wrapping each pie in plastic wrap, then store together in an airtight plastic bag. They will keep well for about 3 months in the freezer.