Spaghetti alla Carbonara

My mom used to make this when I was a kid. It's easy and it can be served as a one dish meal.

Ingredients:

2 tablespoons olive oil
1 small onion, finely chopped
8 pancetta or bacon strips, cut in little squares
500g (1 package) spaghetti
4 eggs
4 tablespoons (60 ml) heavy cream
4 tablespoons (60 ml) grated Parmesan cheese
salt and ground black pepper

Preparation:

Heat the oil in a large saucepan or skillet, add the onion and cook over a low heat, stirring frequently, for about 5 minutes until softened but not colored.
Add the bacon or pancetta and cook for 10 minutes, stirring from time to time.
Meanwhile, cook the pasta al dente according to the package instructions.
Put the eggs, cream and parmesan in a bowl. Add pepper. Then beat everything together.
Drain the pasta, tip into the pan with the pancetta or bacon and toss well to mix. Turn the heat off under the pan. Immediately add the egg mixture and toss vigorously so that it cooks lightly and coats the pasta.
Taste for seasoning, add more if needed. Serve immediately, adding grated Parmesan.