01 -
Smear a spoonful of pesto across one face of each bread slice, making sure it's spread out evenly.
02 -
Take two bread pieces (pesto facing up) and pile on plenty of grated mozzarella or lay down 2 fresh mozzarella slices. If you want, sprinkle some Parmesan over the cheese. Top with the other bread pieces (pesto facing down) to finish your sandwiches.
03 -
Lightly coat the outer sides of each sandwich with soft butter to get that nice golden crunch when you cook them.
04 -
Warm up a non-stick pan over medium heat. Drop in your sandwiches and let them cook about 2-3 minutes on each side. Press them down gently with a spatula until they're golden brown and the cheese gets all melty.
05 -
Take your hot sandwiches off the pan, cut them in half, and enjoy right away.