For the mayonnaise:
-In a bowl wisk the egg yolk and the lemon juice. Add drop by drop the first quantity of oil. When it starts to get the texture of a mayonnaise you can slowly add the rest of oil in a constant pour.
At the end of this step you have a look a like mayonnaise. This is when you add the flavour you want. In this recipe you can add, the sesame oil & the soy sauce. Taste it and adjust the flavour, more salt, a bit of pepper or maybe more acidity (lemon juice, rice vinegar)
Now time to put together all of the ingredient!
Slice your cucumber in the shape you want, put mayonnaise as much you like it, sparkle it with some sesame seed & add more freshness with herbs like dill !