If you want the best potato of your life, you should go to the Bar Pod Ryba in Gdánsk, Poland! They serve multiple menues with baked potato and different toppings, that are plainly a delight to eat. Combined with a pint of good polish beer and you will be happy for the evening :)
I was there this spring and just stumbled upon an old picture, so I thought, I‘d share it with you and recommend the place I bought it.
Bar Pod Rybą
Piwna 61/63, 22-100 Gdańsk, Poland
+48 58 305 13 07
https://goo.gl/maps/ftEREoyq2Yx