Place the lukewarm water in a bowl and stir in the yeast and sugar. Leave for 5 minutes until it foams on top.
Place the flour and salt in the bowl of a stand mixer. Stir together using the dough hook, then slowly pour in the yeast mixture while the mixer is running at a medium speed.
Continue to knead with the dough hook for another 10 minutes, then scrape the mixture into a large oiled bowl (it will be sticky). Cover with plastic wrap and leave in a warm room for 45-60 minutes until it doubles in size.
Preheat the oven to 400 degrees Fahrenheit. Place two large metal baking sheets in the oven to heat up.
Once the dough has risen, scrape it out onto a well-floured surface. Split the dough into two portions and lightly knead to knock out the air. Form the dough into two balls and let them rest for 5 minutes (you can leave for up to 15 minutes, but cover with plastic wrap if leaving for longer than 5 minutes).
Mix together the garlic topping ingredients in a small bowl.
After 5 minutes, dust both of the dough balls well with semolina and stretch out to form a rough pizza shape.
Take the hot baking sheets out of the oven and spray or brush with a little oil.
Place one pizza on each baking sheet (I fold the dough over my arm to move it). Don't worry if it wrinkles and looks a bit messy on the tray, it will smooth out during cooking. Stretch out a little more once on the tray if needed.
Spoon the garlic butter onto the pizza breads and use the back of a spoon or a brush to smooth the butter all over - right up to the edges.
Place in the oven and cook for 7-10 minutes until golden brown. Serve immediately.