Roll out your pie crust(s) and start cutting your larger heart shapes out. You will need 2 for each side of the “cheese hearts”.
Take your mozzarella cheese slices and start cutting your smaller/mini heart shapes. You’ll need just one for each “cheese heart”.
Place your cheese slices in the center of each pie crust.
Coat the other crust side with egg yolk. Then, close up your heart with the cheese inside.
Press down the edges with your fingers. Then, use a fork to seal the edges of each heart.
Spread some grated Parmesan cheese on top of each heart.
Place the hearts in the freezer for about 10-20 min.
Set your oven to 400 degrees.
Bake for 15-20 minutes or until golden brown.
