In a small bowl, combine vinegar, salt, sugar, mustard, shallot, and basil, whisking to blend. In a slow steady stream, add olive oil, whisking until a smooth emulsion is achieved.
Notes
Make-Ahead Tip: Vinaigrette can be made earlier in the day and refrigerated until needed. Let come to room temperature before serving. Whisk again before serving.
Recipe by TeaTime Magazine at https://teatimemagazine.com/veggie-quinoa-salad-lemon-halves-recipe/