These is a simple vinaigrette recipe and variations care of Martha Stewart.
1/4 cup white-wine vinegar
1 tablespoon Dijon mustard
1/4 teaspoon salt
1/2 teaspoon pepper
Pinch of sugar
3/4 cup extra-virgin olive oil
Whisk all ingredients together and pour over salad.
You can store in an airtight jar in the fridge, shake before serving.
Garlic: Add 1 teaspoon minced garlic or 1/2 clove crushed.
Balsamic: Substitute balsamic vinegar for the wine vinegar.
Lemon Parmesan: Use fresh lemon juice instead of vinegar; add 1/4 cup finely grated vegan Parmesan.
Scallion: Add 3 chopped whole scallions (about 1/4 cup).
Herb: Add 2 tablespoons chopped fresh herbs, such as thyme, parsley, or tarragon.