I’m a tourist to Portland so am not very familiar with the local food scene, but if you like pork sandwiches I had a good one on my last visit from Tábor (home of “The Original Schnitzelwich”), which is a food cart in downtown Portland.
A picture in here:
Pok Pok’s wings were very tasty. If you just want their wings, you can also get them at Whiskey Soda Lounge.
