Kosher salt and freshly ground black pepper, to taste
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Instructions
In a large pot of boiling salted water, cook pasta according to package instructions; reserve 1 cup water and drain well.
Heat a large skillet over medium high heat. Add pancetta and cook until brown and crispy, about 4-6 minutes; set aside. Reserve excess fat in the skillet.
Heat olive oil with reserved excess fat. Add sage and cook until crisped, about 3-5 seconds; set aside.
Add garlic and shallot, and cook, stirring frequently, until fragrant, about 2 minutes.
Stir in butternut squash puree and 1/2 cup reserved pasta water. Bring to a boil; reduce heat and simmer until slightly thickened, about 3-5 minutes. Reduce heat to low.
Working quickly, stir in pasta, Parmesan and egg, and gently toss to combine; season with salt and pepper, to taste. Add additional reserved pasta water, one tablespoon at a time, until desired consistency is reached.