Mix shallot, vinegar and salt in a small bowl. Let stand for 10 minutes.
Stir mustard into shallot mixture. Gradually whisk in olive oil. Whisk continuously until well combined.
Notes
Good quality ingredients are essential for dressings. Best used the day it’s made. May be made up to 8 hours ahead of serving. Ensure you whisk until the olive oil is well combined which is when an emulsion forms.
Entertaining tip: Place vinaigrette into the bottom of the serving bowl with salad greens on top. Mix to combine once ready to serve.
Recipe by Healthful Home Cooking at https://www.ourzinctable.com/2016/12/04/french-vinaigrette/