Bring the vinegar, sugar and salt to the boil in a saucepan and let it steep for 2 minutes. Add the chillies, garlic and coriander root and simmer until it has the consistency of liquid honey. Let cool down. Cut the cucumber with the skin into 2 mm cubes and add to the dip. Put the fish meat and curry paste in a bowl and mix well. Add the coconut cream and stir well. Then add the coconut meat, kaffir lime leaves, basil leaves, egg, palm sugar, pepper and fish sauce. Stir until the mixture is sticky and transparent. Let rest for about 10-15 minutes. Shape the dumpling mixture into 6-7 cm long rolls and steam for about 2 minutes. Let cool, wrap each "sausage" in a pandan leaf and stick on a bamboo skewer. Grill over charcoal over medium heat until golden brown.