Preheat oven to 450ºF. Grease and flour a 10 x 3-inch springform pan; set aside.
On a lightly floured work surface, roll out 2/3 dough to an 18-inch round and 1/8-inch thick.
Roll the dough on the pin and transfer to the prepared springform. Center the dough over the pan without stretching it and gently move it around until it sits nicely at the bottom and covers the sides.
Spoon in the filling, pushing the mixture towards the sides to prevent air pockets and evenly smooth out the top, pressing down to compact.
Roll out the remaining dough to an 11-inch round and place it on top of the meat mixture. Firmly press the two dough edges together and trim the edge with a sharp knife.
Brush on an egg wash before folding down the dough from the edge and crimp. Make an indentation and brush the edge with the egg wash.
Transfer the pizza to the oven and immediately, reduce the temperature to 350ºF. Bake for 1:15 hours to 1:20 hours or until the top is golden brown.
Remove from the heat, transfer the pizza to a wire rack and allow to cool for 15 minutes before unlatching and removing the collar.
Let it cool another 45 minutes before removing the bottom of the springform and transfer to a stand or serving plate.