Verneon
Google
I went here with my family and it was great. Amazing, tasty burgers with big portions and local produce, they don't feel "industrial" at all!
The staff was super friendly, one of the waiters asked us some questions and joked with us and she was super nice, service was fast and overall everything was great, the atmosphere felt cosy and friendly as well, I'd definitely come back here again.
Vegetarian options are endless, all burgers are veg by default, but you can switch to beef. Prices are very good for Hamburg's standards (where sometimes you pay astronomical prices for a small burger...), We paid 18 euros per person, and we ordered beer, fries and a big burger, so a very good price.
The place itself is very cute too, nice tables and comfy chairs. Overall, a great experience, totally recommend this place!