I like to make chicken salad with a can of chicken and a spoonful of mayo, you can add a little celery/mustard/pepper for a little more flavor. You could also do egg salad with a couple pieces of cheese on the side. Another good meal to try would be to wrap deli meat/cheese/mayo in a large leaf of lettuce, and just roll it up. Or, take a slice of deli meat, a little cream cheese, and pickle all wrapped up. I'm a student too, so I know the troubles you're going through!