This is more lazy cooking than student cooking, gone are the days when students were proud of what they eat.
I have a different variation on the pitta bread thing though, but takes more effort, I would cut the pitta bread as usual and put the sauce and cheese inside and add something like cooked chicken or prawns you could risk as you can eat them cold but microwave cooking them dries them out too much hence I have pre cooked so I put the pitta bread in only long enough for the cheese to melt.
My flatmate used to make "pizza" which was just bread with cheese and a dash of worcestershire sauce.
Has no one ever heard of French Bread pizza? Just get a piece of french bread and put sauce and cheese on (and herbs if wanted) a few minutes under the grill easy.