Boil the potatoes: Place the cubed potatoes, ginger, garlic and coconut milk in a sauce pan. Turn up the heat to medium low and leave to simmer for 20 minutes until the potatoes are super soft. Stir on occasion so that it doesn’t burn on the bottom.
Season the potatoes: Add the fish sauce to the soft potatoes.
Mash the potatoes: Mash it until it's nice and smooth
Serve the potatoes: transfer to a serving dish and top with crushed dilis and chopped chives