Preheat the oven to 245°C (gas mark 9) with a pizza stone or a baking tray inside for at least 30 minutes.
On a lightly floured surface, stretch or roll the pizza dough (30–35 cm) at room temperature into a circle.
Transfer the shaped dough to a sheet of baking parchment or a floured pizza peel.
Spread the tinned crushed tomatoes evenly over the dough, leaving a 1 cm border around the edge.
Scatter the shredded mozzarella over the tomato base.
Slide the pizza (on the parchment or peel) onto the preheated stone or tray and bake for 10–15 minutes, or until the crust is golden and the cheese is bubbling.
Remove the pizza from the oven and immediately top with the prosciutto slices and rocket leaves.
Drizzle over the olive oil, sprinkle with the shaved Parmesan and season with sea salt and freshly ground black pepper.
Slice and serve straight away.