Heat a frying pan and add the pancetta cubes. Bake until the pancetta is crispy.

Meanwhile, bring a pan of water to a boil and cook the pasta according to the package directions with a pinch of salt.

Beat the eggs and egg yolk in a bowl. Add the parmesan cheese and a good pinch of black pepper. Stir well.

Drain the spaghetti and collect some of the pasta water.

Return the spaghetti to the pan and add the pancetta with the fat from the pan. Stir together.

Turn the heat down to very low, on the lowest setting, and add the egg mixture to the pan. Stir well again and let it warm up. Do not set the fire too high, otherwise, you will get scrambled eggs and that is not what we want.

Add a little bit of cooking water to get smooth and glossy pasta.

Serve the pasta with some black pepper, a little extra Parmesan cheese, and optionally some fresh parsley.