Tortelloni With Butternut Squash, Pancetta, and Sage Butter

Bring a large pot of salted water to a boil. Meanwhile, in large nonstick skillet, cook pancetta on medium-low heat for 10 minutes, stirring occasionally, or until crisp and the fat has been rendered. Remove pancetta with slotted spoon; drain on paper towel. Add squash to boiling water in pasta pot; cook 5 to 6 minutes, until almost tender. Scoop out squash from boiling water with small strainer and add to drippings in skillet. When water returns to a boil, add pasta, stir a few times, and cook according to package directions, about 5 minutes. Cook squash in drippings 2 minutes over medium heat, stirring, until just tender; transfer mixture to a pasta bowl and cover to keep warm. Melt butter in skillet over medium-low heat; add sage leaves. Cook, turning leaves occasionally, until crisp and butter begins to brown, with small brown bits forming on the bottom of the pan (mixture will have a nutty aroma). Drain pasta; add to squash mixture in pasta bowl with butter mixture, pancetta, salt, and pepper. Gently toss with large spoon to coat pasta with sauce. Serve with Parmesan cheese.