This recipe is really very simple and fast and you will get an excellent result.
It looks like a particular recipe although it requires a certain attention and delicacy in handling the main ingredient, that is the yolk.
To prepare the fried yolk it is important to start with very fresh eggs.
How do we know the freshness of eggs unless we get them from our hen?
Simple, you put the whole egg with the shell in a large glass full of water if it rests well on the bottom it means that it is very fresh.
The last piece of advice I give you is to use excellent raw materials, very fresh eggs, large and consistent seasonal porcini mushrooms and a good quality black truffle, only in this way will you get a combination of flavors that will leave you pleasantly surprised.