Fry the bacon on a hot pan until it is golden and crispy.
Fill a pot with lightly salted water and bring it to a boil. Add the spaghetti and cook it al dente as per the package instructions.
Mix egg yolks, cream, and grated Parmesan in a bowl. Season the mixture with lemon juice, salt, and plenty of pepper.
When the spaghetti is done, drain the water. However, keep about 1 dl. of the boiling water with the spaghetti, as it is needed for the sauce.
Pour the egg/cream mixture onto the pan with the fried bacon and mix everything well together.
Add spaghetti and boiling water and mix everything well together. Feel free to grind more black pepper over the dish.
Serve immediately, preferably with extra Parmesan, a green salad, and freshly baked bread.