For pasta, for every 100g pasta you need 1 litre water and 10g salt. Put a large pot with water on a high heat, add salt and bring to boil. Add spaghetti and cook until al dente. Drain the pasta.
Peel the cheeses and roughly chop them. Pour cream into a saucepan and add cheeses. Over low heat, stir until cheeses have melted into a thick sauce. Transfer pasta on plates and pour it over with the cheese sauce. Serve immediately.
My tips and tricks
Remember that four-cheese sauce thickens as it cools, so serve it right away. But if, nevertheless, it became thicker, then you can put the sauce again on low heat, add a little milk and, constantly stirring, bring it to the desired consistency.
Maria Kalenska Gastronomy Blog | https://www.myodesacuisine.com/recipes/four-cheese-pasta/