03Meanwhile, cook the pasta. Bring the water in the pot back to a boil and add the pasta. Cook al dente, following the timing instructions on the package.
04Before draining the pasta, ladle 1/2 cup of the cooking water from the pot into the frying pan with the collard greens and onions. Drain the pasta and toss with the greens. Serve, topping each serving with Parmesan to taste.