Add the pesto and vinegar together in a medium-sized bowl.
Slowly whisk in the oil until the dressing becomes emulsified.
Adjust the seasonings with salt and pepper.
Store or serve the pesto vinaigrette.
Notes
Make-Ahead: For freshness, you can make this Pesto Vinaigrette up to 3 days ahead. You can serve this immediately, but more flavors will come out with time. In addition, let it sit at room temperature before serving it.How to Store: Place in an airtight container in the refrigerator for 5 to 7 days. This will not freeze.Make this recipe in a stand mixer with the whisk attachment for the ultimate emulsified dressing.Emulsify is just a fancy culinary term to combine two things that generally wouldn’t go together, like oil and vinegar.