Restaurant in Hamburg with real tree inside

Hello! I wonder if anyone could help: I lived in Hamburg for about 8 months 9 years ago and whilst there I visited this amazing typical German (wurst and sauerkraut) restaurant which had a huge, live, leafy tree in the middle of it! I used to live in Saarlandstrasse and I remember taking the yellow line from there and then changing at Barmbek onto the green (or red) line for only a few stops, maybe one or two, potentially three, but might be wrong. I googled all sorts of combinations for places in German and English, but don't seem to find it at all. If anyone knows of it please!!! could you help me finding it again? I'm planning to go soon and would really love to go back there again.

Thanks so much!