Remove the stalks of the mushrooms and finely chop the head.
Chop the spring onions into fine rings, peel the ginger and finely chop.
Slowly roast the sesame in a pan without any fat until light brown, then put aside and allow to cool. Whisk eggs, soya sauce and 2 tbsp. of water.
Fry the mushrooms in the sesame oil at a high temperature, add the spring onions and ginger and fry together for a short while.
Reduce to a medium heat, add the whisked eggs and allow the mass to slowly coagulate.
Allow the finished omelette to cool a bit on a plate before carefully rolling together and cutting diagonally into thick slices.
Serve on a plate and garnish with the roasted sesame and some chives.
If the rolled-together omelettes do not keep their shape, you can carefully tie them together with a blade of chive - or use a toothpick.