step 1
Blend the egg yolk and vinegar together. After 20 seconds add the mustard and Worcestershire sauce.
step 2
Add, in a thin stream, the sunfloweroil so that it emulsifies. Wait after 50 ml or so to see the texture changing the a thicker consistency. Don't rush!
step 3
Finally add salt and pepper to taste (and parsley or other fresh herbs to add flavour)
step 4
* if the mayonaise does not thicken and remains runny, rebuild your base (egg yolk and vinegar) and at the broken mix bit by bit.