For a Slightly Greek Dressing: substitute red wine vinegar for the sherry vinegar and add 1 tsp dried oregano.
For a More French Dressing: substitute white wine vinegar for the sherry vinegar and add a minced shallot and a tiny bit of dried herbes de Provence or minced fresh thyme and/or tarragon.
For Seeded Mustard Dressing: simply add a spoonful of seeded mustard along with the Dijon.
For a Really ’80s Dressing: substitute balsamic vinegar for the sherry vinegar.
Reprinted with permission from Small Victories by Julia Turshen, photographs by Gentl + Hyers, Chronicle Books 2016.