Preheat the oven to 475 degrees . On a baking sheet, drizzle the squash with some of the EVOO; season with salt, pepper and nutmeg. Roast until just tender and brown at the edges, about 17 to 20 minutes.
Meanwhile, bring a large pot of water to a boil, salt it, add the penne and cook until al dente. Drain the pasta; reserve 1 cup of starchy cooking water.
While the pasta is cooking, heat 1/4 cup EVOO in a large skillet , four turns of the pan, over medium-high. Add the parsley stems, garlic, ginger, chile and scallion whites; swirl 2 to 3 minutes. Add the stock and reduce heat to simmer. Add half a ladleful of the pasta cooking water to the sauce. Add the pasta, parsley leaves, scallion greens, squash and cheese to the skillet. Stir to combine. Adjust the seasonings.
From Every Day with Rachael Ray, October 2013