We found this place by an accident. And were happy not to find the one we were search for.
This place is "hidden" in bicycle shop/rental but worth searching for. Its a small cafe/bar where they offered us one vegan menu- soup (tomato) and main course (we had sweet potatoes and soja meat). It was super delitious and the portions were huge (the menu cost 6€). We wanted to have some sweet treat and coffee but we were so full we could manage it.
The place itself is really cozy and the stuff is super awesome.
Cons: Not exactly in the centre