A trending vinegar, balsamic vinegar marries well with mustard to create this delicious, Mustard Balsamic Vinaigrette on Spinach salad.
Whisk together vinegar, oil, honey, mustard and garlic. Let stand.
In bowl, layer spinach, tomatoes, walnuts, cranberries and egg. Top with mozzarella (and chicken, if desired).
Drizzle dressing over salad just prior to serving.