Preheat the oven to 400 degrees.
Chop the prosciutto into small chunks.
Lightly dust a clean work surface and your hands with flour. Stretch the dough using both hands, until it is roughly the size of the pan. Use additional flour as necessary to prevent the dough from sticking to your hands or your work surface.
Lightly dust your pan with flour and gently lay your stretched pizza dough on it.
Spoon up to 2/3 cup of pizza sauce onto the dough a little at a time, spreading it around with the back of a spoon. Continue until the dough is covered with a thin layer of sauce, leaving about a 1-inch border for the crust.
Next, sprinkle handfuls of mozzarella cheese onto the pizza. We recommend starting from the edges and working in towards the center, using a lighter hand, and then adding more cheese where needed to fill in the gaps.
Generously top the pizza with prosciutto.
Finally, season the crust. Lightly brush the crust with melted butter, then sprinkle with garlic powder, onion powder, oregano, and sea salt.
Bake for approximately 16 minutes, or until the crust starts to turn golden and the cheese is bubbly and lightly browned.
Top the pizza with a few handfuls of baby arugula and bake for another 2 minutes.
Let cool for at least 2 minutes before slicing.
Gently loosen pizza from the pan with a spatula. Then slice, serve, and enjoy!