When the dough is ready, divide into two (see notes)
Grease and/or line a fairly large (at least 20cm / 7¾") round dish or pan.
Take one piece, and turn it out on a floured surface. Roll the dough into a rough circle of around 30cm / 12" in diameter, and 1cm thick.
Warm the butter in the microwave until it is just melted, and stir in the garlic. Brush it over the dough, covering the whole surface.
Place the cheese in the middle of the dough circle leaving a good, wide edge all the way around. Turn over the edge, all the way around, so that eventually, all of the cheese is covered by the dough.
Turn the dough over, with the smooth surface on the top, and roll it out very carefully until it is around 18cm / 7" in diameter and 2-3cm / ¾-1¼" thick.
Pre-heat the oven to 200℃ / 400℉.
Place in the prepared pan and sprinkle over some mozzarella, the salt and oregano. Cover with a tea towel and leave for around 30 minutes to rest.
Bake in the lower part of the oven for around 20 minutes, just until the top is a lovely golden brown.
Leave to cool in the pan, and then serve warm with your favorite dinner. Enjoy!