Mustard French Dressing - cooking recipe

Ingredients

1 Tbsp. Dijon or Dusseldorf prepared mustard
1 Tbsp. raw egg white
1/2 tsp. lemon juice or wine vinegar
1/4 tsp. salt
1/3 c. olive oil or vegetable oil
5 to 6 grinds white pepper or 1/2 tsp. green peppercorns, crushed into a paste
1 tsp. finely minced shallots or scallions and/or minced fresh green herbs, such as parsley, basil and dill (optional)

Preparation

Beat the mustard and egg white in a bowl for a good minute with a wire whip.
When thick, beat in the lemon juice or vinegar and the salt. Then, by droplets, beat in the oil to make a cream sauce.
Beat in the optional ingredients and correct the seasoning.
This dressing is lightly thickened, for about 1/2 cup.