Caramelize Onions: While the pumpkin is cooking, caramelize the onions. Add the sliced onions to a large skillet and cook them for about 10 minutes until they're softened.
Assemble Pizza: Cover the pizza with fresh mozzarella cheese. Add the cooked pumpkin on top of the mozzarella. Sprinkle the freshly shaved Parmesan cheese over the pumpkin.
Crispy Sage: Fry sage leaves in about ½ inch of olive oil in a small skillet over medium heat. Cook them for 30 seconds on each side. Once they're crispy, remove them from the pan.