Coconut milk - 1 cup
Fresh or frozen lemongrass - 1/2 a stalk
Galangal - fresh - 6 slices
Kaffir Lime Leaves - 2 (hand-torn)
Thai bird's eye chillies
Fish sauce - 1 tbsp (The saltiness can vary a lot across brands, so start with less always.)
Lime juice - 2 tbsp ( I used lemon instead)
Sugar - 1/2 tsp
Coriander leaves - 2 tbsp
Boneless chicken breast - 50 gm (chopped)
Straw mushrooms (or regular button mushrooms) - 4 (sliced) ( I didn't put this)
For the lemongrass, use only the bottom white part (about 6 inches) and discard the woody grass part of it. With the flat side of a cleaver or a heavy object, pound and bruise the lemongrass so it releases the flavour. Cut into 2 inch segments.
Put the stock into a pot and bring to a boil. Toss the galangal, lemongrass, sugar, and lime leaves in. Simmer for 5 minutes.
Add the coconut milk, chillies, fish sauce and simmer for another 5 minutes.
Finally, add the chicken and mushrooms and cook till the chicken is just cooked. The moment you see it turning all white on the outside, it's 90% done.