How to make
Boil the spaghetti with salt and 2 tablespoons of olive oil, then drain them. Meanwhile, heat the remaining 2 tablespoons in a suitable container, pour the cream in and stir until warm.
Add the crumbled feta cheese, grated blue cheese, basil and walnuts. Wait for them to come to a boil and remove from the heat. Serve each plate of spaghetti covered with plenty of cream sauce.