I went vegetarian a few year ago and it has been hard to find really decadent comfort foods to eat when you don't eat meat. One of my favorites is Velveeta macaroni and cheese, the one with the little shells.
I will cook up a box and mix in peas and add a little shredded cheese to the top. Oh it is so good. It is not the same as biting into a big cheese burger but it comes close.