Rootz was one of my favourite finds in Berlin! I was there in August and was able to take advantage of the outdoor seating - the front of the building is painted with lots of colourful root vegetables and looks very inviting. The burgers are great, and I think all of them can be veganised. Always check for the daily specials as well - I had the spicy Mexican burger from the menu, but my boyfriend got the special and it was amazing! The cakes are also fantastic and there are plenty of vegan options. We tried the peanut butter devil's food cake and a salted caramel cupcake which was sublime. Highly recommended for a quick lunch or a leisurely tea and cake break.