We recently travelled from Bangkok to Chiang Mai. It's a long way so we needed to stop several times for food. We were with my brother-in-law who works for EGAT (Electricity Generating Authority of Thailand). In his job he travels all over Thailand and is great for knowing the best places to eat. He recommended a restaurant in Lampang which serves a really great dish of Khao Soi, sometimes spelled Kao Soi.
I had eaten Khao Soi while living in Bangkok. The shop which used to sell it though fell victim to the riots of 2008 and I have been longing for a dish since that time. So, as you can imagine, I was very pleased to hear we'd be stopping at a restaurant well-known for this speciality of Northern Thailand. I usually choose to eat chicken breast and was a little disappointed to hear they only served chicken legs here. It tasted amazing though and I washed it down with a glass of guava juice. I asked for an extra portion of crispy noodles, as I like that part the most. Then my brother-in-law ordered another bowl for me of just the curry and noodles. I ate the lot. It really is that good.
On the return journey, three days later, we stopped at the same restaurant (Khao Soi O-Ma) and had two bowls again. Yes, I put weight on during this holiday.
Below you will find a link to a recipe for it. Enjoy.