Preheat oven to 350F
Dust your work surface with all-purpose flour. Lightly roll out the puff pastry with a rolling pin.
Begin cutting hearts with the cookie cutter. Cut enough hearts to have 2 sides. Place one side of each heart on a baking pan lined with parchment paper. Place a small portion of blueberry jam in the center of a heart, add a few chocolate chips. With a pastry brush, brush the edge of each heart with egg wash. Place the other side of the heart on top and gently pinch the edge to seal.
Place sheet pan into the oven and bake 12-15 minutes or until golden. Allow to cool before serving.
California biggest blueberry fan Tawnie travels to Critchley Farms in Kingsburg and whip up a batch of fresh blueberry lemon cookies.