Peel ginger and garlic and chop very finely. Whisk egg yolk, flour and 1/8 litre water. Stir in ginger and garlic and chill. Clean the mushrooms, possibly halve them. Clean and wash spring onions, cut into bite-sized pieces.
Wash fish, dab dry and cut into large cubes. Sprinkle with lime juice and salt. Turn mushrooms, spring onions and fish in flour one after the other, pull through the dough and fry them floating in hot fat until golden brown. Serve garnished with Asian chives and lime. Serve with soy sauce garnished with horseradish and minced green chili