Ingredients
1 tablespoon extra-virgin olive oil
4 ounces pancetta, guanciale, or bacon, sliced into 1/2-inch thick strips
1 large egg, plus 3 egg yolks
1/4 cup heavy cream
Kosher salt and freshly ground black pepper
1/2 cup grated Parmigiano-Reggiano cheese, plus more for serving
1 pound spaghetti
Preparation
In a large skillet, heat oil and pancetta over medium; cook, stirring occasionally, until crisp and browned around edges, 3 to 4 minutes. Using a slotted spoon, transfer to paper towels to drain. In a medium bowl, whisk together egg, yolks, and cream; season lightly with salt and pepper.
Meanwhile, cook pasta in a large pot of boiling salted water 1 minute less than package instructions. Drain, reserving 1 1/2 cups pasta water. Add 1 cup pasta water to skillet; bring to a boil. Add pasta and cook, stirring, until reduced slightly, about 2 minutes. Remove from heat.
Slowly add egg mixture to pasta, stirring, until sauce thickens and clings to pasta. Stir in cheese and pancetta; season generously with pepper and serve immediately with more cheese.
