For the people who eats only Pasta with cheese 
There is a simple food that is tasty and miight contain more nutrition, and they might like it 
Pasta+cheese and sour cream. ( it is at tescos usually, it is not double cream, t might say Creime Fraichey, or something like that) 
One of my favourite food, tasty but nut too filled with hard taste ( that people might dislike) and that sour cream might give something extra nutrition to the food ( I am not a professional at bilogy :/) 
  
and for the topic: I am not a fussy eater, although I eat cheese for nearly everything, and pasta is my favourite food. 
 
just search for it on a adult website, it will correct you