Thanks for the shout out, @tigerjohn .
@Ziggy , you’re most welcome to ask any specifics if you’re coming to Penang
I shan’t comment on Chiang Mai, as I was there many years ago and my take on the place may be outdated. But one place I’d still mention is Nasi Jumpru - it’s a beautiful spot, and I know it’s still doing very well as its owner, N T Maneeyoung, became Facebook friends with me after my last visit in 2017, and I still get fabulous updates of his place.
For Bangkok, Chinatown’s main thoroughfare, Thanon Yaowarat, becomes a giant outdoor food street every evening. Don’t miss it.