This Thai coconut soup is one of my absolute favorites, and here instructables user zedomax teaches us how, and writes:

Here’s how to make some authentic Thai coconut chicken soup, Tom Ka Gai. You can trust me on this as my girlfriend is Thai and she’s taught me how to make it about a year ago. Best of all, she’s approved of my authenticity of making good Thai coconut soup. She has also lived in Thailand most of her life so this is going to be as authentic as you can get, next to being a professional Thai cook from Thailand. This is the northen Chiang-Mai style, just in case you are Thai.