Heat the oven to 475°F and place a baking sheet or pizza stone inside to warm.
Roll or stretch the pizza dough into a 12-inch round on parchment paper.
Spread the pizza sauce evenly over the dough, leaving a small border around the edge.
Sprinkle the mozzarella cheese over the sauce.
Tear the prosciutto into long strips and arrange them in a loose rib-cage pattern across the cheese.
Slide the pizza onto the hot baking sheet or stone and bake for 10 to 12 minutes until the crust is golden and the cheese is bubbling.
While the pizza bakes, toss the arugula with the olive oil, salt, and black pepper in a bowl.
Remove the pizza from the oven and scatter the dressed arugula over the top before slicing.