The tuna, noodles and Parmesan cheese and milk are required, everything else is optional and to suit your taste.
DON’T add salt as the parmesan cheese is already quite salty.
The Tuna can be either the kind packed in oil or water is fine. Make sure and drain it though.
If you want to make less, use half a bag of noodles and half the tuna.
I purposely typed in instructions for a large batch so that you can either make it and freeze some or have enough to feed your army.