- 1 tablespoon olive oil
- 6 ounces guanciale (salt-cured pork jowl), pancetta (Italian bacon), or slab bacon, thinly sliced, cut crosswise into 1/2-inch pieces
- 2 shallots, finely chopped
- 4 garlic cloves, thinly sliced
- 1 teaspoon freshly cracked black pepper
- 12 ounces bucatini or other long-strand pasta
- Kosher salt
- 2 ounces Parmesan, grated, plus more
- 2 large egg yolks
- 1 teaspoon finely grated lemon zest, plus thinly sliced zest for serving
- 2 tablespoons fresh lemon juice
- Heat oil in a large skillet over medium. Cook guanciale, tossing often, until browned and crisp, 6–8 minutes. Add shallots and garlic and cook, stirring occasionally, until softened, about 5 minutes. Add pepper and cook, stirring often, just until fragrant, about 1 minute.
- Meanwhile, cook pasta in a large pot of boiling salted water, stirring occasionally, until al dente. Drain, reserving 1 1/2 cups pasta cooking liquid.
- Add pasta to skillet along with 1/2 cup pasta cooking liquid and 1 oz. Parmesan and toss to coat. Remove skillet from heat and add egg yolks. Toss again, adding more pasta cooking liquid as needed, until a smooth glossy sauce coats pasta. Add grated lemon zest, lemon juice, and another 1 oz. Parmesan. Toss to coat, adding more pasta cooking liquid if needed to loosen sauce.
- Divide pasta among bowls; top with sliced lemon zest and more Parmesan.