First, preheat your oven to 400°F (200°C) so it’s hot and ready. While the oven heats up, make sure your chicken is fully cooked and sliced. This step ensures you don’t end up with undercooked chicken inside the calzone.
Roll out the pizza dough into a circle about 12 inches wide. You want it thin enough to fold easily but thick enough to hold the filling. Leave a slightly thicker border around the edges for sealing later.
On one half of the dough, spread about ½ cup of pizza sauce, leaving a one-inch border around the edge. Layer on mozzarella, grated Parmesan, and your sliced chicken tenders. Try to spread everything evenly so each bite has all the good stuff.
Fold the empty half of the dough over the filled half to create a half-moon shape. Press and pinch the edges tightly to seal, making sure nothing leaks during baking. Place it carefully on a greased or parchment-lined baking sheet.
Brush the top of the calzone with melted butter and cut three small slits on top so steam can escape. Bake for 20 minutes, then remove it, spread another ¼ cup of pizza sauce on top, and sprinkle more mozzarella. Return to the oven for another 10 minutes until golden and bubbling.
Let the calzone rest for about 5–7 minutes after baking. This allows the cheese to set slightly and prevents it from oozing out when slicing. Then cut into strips or wedges and get ready to dig in!