How to make
Remove the bacon skin, chop it finely and saute in a pan without oil on a moderate stove. Add the julienned onions.
Wait for the bacon to redden nicely and for the onions to soften - about 7-8 min. Add the sour cream and stir for about 3-4 min. until it changes color from white to a nice yellow.
Add the yolks, beaten in advance, while stirring nonstop for about 2-3 min. until they coagulate. Sprinkle with a little ground black pepper.
In the meantime, boil the tagliatelle in a pot with water, salt and 2 tbsp olive oil, for the amount of time written on the package.
Strain the ready tagliatelle and pour the sauce over them. Sprinkle each serving with grated parmesan and fresh basil.