Place pizza stone in oven, if using.
Heat oven to 500°F.
Sauté onions and asparagus in olive oil until onions just begin to brown, about 3-4 minutes. Set aside.
Roll pizza dough out into a rectangle on a piece of floured parchment.
Top with 2-3 Tablespoons olive oil.
Spread over entire surface of dough.
Sprinkle parmesan over top.
Spread onions and asparagus evenly over dough.
Tear prosciutto into pieces, if desired, and place on pizza.
Crumble goat cheese on top.
Bake for 8-10 minutes, until crust is golden brown.