1
Adjust racks to middle and top positions and preheat oven to 400 degrees. Bring a large pot of salted water to a boil.
Reserve half the mozzarella in a small bowl (you’ll use the rest in the next step).
In a large bowl, soak half the panko (you’ll use the rest later) with 2 TBSP water (3 TBSP for 4 servings); let sit until absorbed.