for 1 dl

1	fresh egg yolk
1 tsp	mild mustard
1 tsp	lemon juice
¼ tsp	salt
1 dl	rapeseed oil or olive oil (not cold-pressed)
a little	pepper
a little	Worcestershire sauce

How it's done

In a bowl, thoroughly whisk the egg yolk with all the other ingredients up to and including the salt.

Add the oil drop by drop to begin with, then more gradually, whisking constantly to form a thick mayonnaise, season.

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