Line a large baking tray with parchment paper. Roll the pizza dough into a log, cut into small 3-cm pieces, then using your hands form the balls. You should be able to form 23 balls.
Place the dough balls on the baking tray touching one another in the shape of a Christmas tree.
Brush with egg wash. Sprinkle with grated cheddar cheese. Bake in a preheated oven at 200C for 20 minutes until golden.