Right now in Münster, Germany. Being a small student city prices are really reasonable. In the student's cafe you can get a complete meal (example: pasta with chicken and yoghurt and salad) for 2.20 Eur. Add 70 cent for a water and you have a 3 eur meal. Now, they also have high quality wok food or special foods, these are usually 3 Eur or 3.50 eur :)

In most european countries, student's food is state subsidized, that explains the fantastic prices.