Lunch? Whatever is at one of the three main cafeterias or self-catering restaurants at the uni, I guess. Most of the time is basic home-foods made for large masses: soups, different sauces with rice, potatoes and/or pasta, salad-foods (not only for vegans! They make a mean chicken-tuna salad), sometimes oven-prepared fish etc. You know, the usual. Though for an extra you can take the 'Special' meal which is usually steak or fillet of some kind.
But I stay mainly with the salads and the normal 'house-meal' they offer.