Cook macaroni until soft (not al dente) . Drain and rinse with cold water. Stir vinegar into cooked macaroni and let sit about 15 minutes. In a bowl, add celery, scallion and carrots. in another bowl mix remaining ingredients to make dressing. Place the cooled macaroni in the bowl with vegetables and stir to combine. Add dressing and stir to combine. Adjust seasonings, to taste. Place in the refrigerator to cool. Once salad has chilled, stir and serve