How to Make It
Cook the pasta according to the package directions, reserving ½ cup of the cooking water; drain the pasta and return it to the pot.
Pulse together the parsley, pecans, Parmesan, ½ teaspoon salt, and ¼ teaspoon pepper in a food processor until finely chopped. With the machine running, add 5 tablespoons of the oil and process until smooth.
Heat the remaining tablespoon of oil in a large skillet over medium-high heat. Add the sausage and cook, breaking it up with a spoon, until browned, 6 to 8 minutes.
Add the pesto, sausage, and ¼ cup of the reserved cooking water to the pasta and toss to coat (adding more cooking water as needed to loosen the sauce). Sprinkle with Parmesan.