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Rach puts pumpkin to good use TWICE in this flavor-packed pasta, using it both roasted and puréed.
For more recipes that use orange squash, check out Rach's Roasted Garlic Pumpkin Soup or Beef Stew with Bacon and Butternut Squash.
Heat a large pot of water to boil for pasta.
Preheat oven to 425°F with rack at center. Line a sheet pan with parchment.
Arrange the squash and garlic on sheet pan, cover with even layer of EVOO and season with salt, pepper or red pepper, nutmeg and zests. Nestle the lemon and orange cheek in with the squash.
Roast squash 25 minutes or until browned at edges and tender. Let cool slightly. Purée half.
Toast nuts in small pan.
Once nuts are toasted transfer to board and chop or crush in bag once cool. Melt butter in the same pan over medium heat, add sage and lightly brown butter. Remove crispy leaves to small plate lined with paper towel to cool.
Salt pasta water, cook pasta 1 minute less than package directions and reserve ¾ cup pasta water.
Return drained pasta to pasta pot and combine with squash purée, browned butter, a squeeze (1 teaspoon each) of roasted lemon and orange, half of the crispy sage leaves, the parmesan, half of the toasted walnuts and reserved pasta water as needed. Transfer to platter and cover with pumpkin seeds (if using), remaining walnuts, roasted squash and crispy sage leaves. Serve with more parmesan.