Add the sliced shallot and white wine vinegar to a small bowl or jar.
Ingredients (for 8 servings)
1 whole — medium shallot, thinly sliced • 1/3 cup extra-virgin olive oil • 1/4 cup white wine vinegar • 1/4 cup maple syrup • 2 tsp Dijon mustard • 1/8 tsp salt • 1/8 tsp black pepper