Makes a complete meal.
There are probably as many Waldorf salads as there are people who make it. This one makes a complete meal, perfect for a pack lunch or picnic. Mark Bittman, author of “How to Cook Everything,” gets credit for the salad dressing, to which I added chives. To make dressing, combine yogurt and blue cheese in a small bowl. Mash with a fork, leaving some lumps in place. Stir in lemon juice and chives. Add pepper and sea salt if desired. Set aside. Divide greens, tuna, walnuts and grapes between 4 serving plates or containers with snap-on lids. Toss diced apple with orange juice, then arrange over salads. Pour blue cheese dressing over salads just before serving, or divide between 4 small bottles, cover, and refrigerate until serving or packing in insulated lunch totes.