Place a pizza stone into the oven and heat it up to 450F;
Once the oven reaches 450F, continue to heat up the stone for 30 minutes;
In the meantime, prepare your sauce;
Remove tomatoes from the can and reserve 1 1/2 cup of puree;
Remove and discard the seeds from the tomatoes;
Add tomatoes into a food processor and pulse until slightly crushed;
Add the reserved puree and salt and pulse one or two times to combine. Then set aside;
Next, spread some flour with semolina onto a pizza peel and place one of the balls on it;
Either push or roll the dough until ¼ inch thick (if the dough springs back, let it rest for 10 minutes and then continue);
Spread a ½ cup of sauce onto the dough, leaving about 1 inch off the edges;
Add half of your cheese slices;
Add half of the Prosciutto (again, if desired);
Season with salt and pepper;
Gently slide the pizza from the peel onto your hot stone in the oven;
Bake for 10 minutes;
Using the pizza peel, remove the pizza from the oven;
Add fresh basil leaves and cut the pizza into triangles;
Repeat the process with the second ball.