We have a cafeteria in the first floor that is open Monday through Friday 8-17h. At lunch time you can find vegan and vegetarian food (and only that!) for 5 to 6 € as well as different (hot) drinks and baked goods. There is a vegan dish on every day.
You can grab a so-called “Mensapickerl”, a sticker for your student ID at Journaldienst with which you get a 2€ discount.
You can find more information as well as the menu here.