Preheat the oven to 200°C.
Heat the water in the kettle or pan.
Pour into a bowl and dip in the rice vermicelli for 5 minutes.
Peel the prawns but keeps the tail
Interweaving a few threads of vermicelli around each shrimp and cover with the head to the front tail.
Place them on a baking sheet covered with baking paper and brush the visible side with melted butter.
Bake for 13-15 minutes
Using a hand blender or blender, mix the sour cream, dill, lemon juice and cayenne pepper.
Salt as you please.