Step 1

Preheat the oven to 425°F (218°C). Line a sheet pan with aluminum foil or parchment paper. Set aside. Meanwhile, bring a large pot of salted water to a boil for the pasta.

Step 2

Trim the ends of the delicata squash and slice them in half lengthwise. Using a spoon, scoop out and discard the seeds. Cut each squash half into ½-inch thick half-moon slices and place on the sheet pan. Drizzle with olive oil, salt, and pepper, and spread them evenly on the sheet pan so they are not touching. Roast for 20 to 25 minutes, flipping the squash halfway through, until they are tender and caramelized.

Step 3

As the squash is roasting, prepare the walnut-sage pesto. Combine the parsley leaves, walnuts, garlic cloves, and fresh sage leaves in the bowl of a large food processor, fitted with a blade attachment, and pulse until coarsely chopped. Add the roasted walnut oil and process until mostly smooth. Season to taste with salt and pepper, and transfer to a bowl. If you wish, you can add a touch of fresh lemon juice or zest too.

Step 4

Line a small plate with paper towels. In a small non-stick pan, heat a thin layer of extra virgin olive oil (about ¼ cup) over medium-high heat until hot. Fry the sage leaves, in batches, until crisp (it should only take a few seconds). Transfer with a slotted spoon to the plate and season lightly with salt. Set aside for serving.

Step 5

As the squash finishes roasting, add the dried whole wheat pasta to the boiling water and cook until al dente. Reserve roughly 1 cup (240 mL) of the starchy pasta cooking water and drain the pasta. Transfer the pasta back to the same pot, drizzle lightly with olive oil, and add the walnut-sage pesto and grated parmigiano-reggiano cheese. Toss until the pasta is evenly coated in the sauce, adding some of the reserved pasta water as needed (this amount of pesto will generously coat all of the pasta, but the starchy cooking water will help create an even creamier, better distributed sauce.

Step 6

Serve topped with roasted Delicata squash pieces and fried sage leaves. Top with grated parmigiano-reggiano cheese (as desired).