Preheat the oven to 475 degrees F and line a baking sheet with parchment paper. Roll the pizza dough into a 12-inch circle and place it on the prepared sheet.

Heat a skillet over medium heat and add the ground sage sausage. Cook for 6 to 8 minutes, breaking it into crumbles, until browned. Stir in the minced garlic during the last minute and remove from heat.

In a small bowl, stir together the pumpkin puree, olive oil, and a pinch of salt and black pepper to make the sauce.

Spread the pumpkin sauce evenly over the dough. Scatter the cooked sausage mixture on top, then sprinkle with mozzarella and Parmesan cheese.

Bake for 12 to 15 minutes until the crust is golden and the cheese is bubbly. Remove from the oven and scatter the fresh sage leaves over the hot pizza before slicing.