Instructions

  1. To prepare the dressing, in a small bowl, whish the vinegar, oil, sugar, salt, mustard and pepper.
  2. In a large salad bowl, combine the tomatoes, onions and basil.
  3. Drizzle with the dressing; toss to coat.
  4. Refrigerate, covered, tossing once, until the flavors are blended, at least 1 hour.