Definitely not "traditional," but I had some ramen i needed to use up and had a Some parmesean I could grate. Needed 2 yolks to coat it fully. Used too much pasta water so it was less thick than desired. Definitely easy and repeatable.
Used shallots x2 and half an onion (to finish off leftover veg in the fridge) Used 1 400ml can full fat coconut milk Quite thick, will add oat milk to thin it out next time