Start by measuring out all your ingredients.

In a mixing bowl, whisk together the vinegar and Dijon mustard.

If you’re using garlic, add the minced clove to the bowl.

While whisking, slowly drizzle in the olive oil.

Add salt and pepper to taste.

Give your vinaigrette a taste and adjust the vinegar or oil as preferred.

Pour the vinaigrette into a jar or bottle for storage.

If not using immediately, refrigerate and shake well before serving.