Stir the sage, butternut squash, Parmesan and mozzarella into the risotto. Turn the heat off, leave the pan on the heat, and let the cheese melt. Season, to taste, with salt and pepper.
Those deeply caramelized roasted cubes will make a wonderful addition to risotto ... consider using butternut squash as a pizza topping. Paired with sage, goat cheese, and caramelized onions ...