In a small bowl, combine vinegar, lemon juice, and shallot. Let stand for at least 10 minutes.
Add sugar, salt, pepper, chives, dill, and parsley, whisking to combine. Gradually drizzle olive oil into vinegar mixture, whisking constantly. Cover, and refrigerate for up to 3 days. Bring to room temperature, and whisk before using.
Recipe by Victoria at https://victoriamag.com/vegetable-spring-rolls-lemon-herb-vinaigrette-recipe/