Stir in the mustard, season and then slowly add the vinegar and oil while stirring.
Finally stir in water. I use about 100 ml of water.
It is best to transfer the dressing into an oil or vinegar bottle. Keeps for a few days in the refrigerator. Always shake the bottle well beforehand, as the oil will always settle.
The recipe is enough for one bottle (1l).
I like to use this recipe for leaf salads. It tastes especially good with lamb`s lettuce!