Waldorf salad tastes like summer. A creamy, bright dressing livens up the tuna, and walnuts and grapes bring the texture. It's a substantial serving of protein and tastes fabulous on greens or with bread.
Swap option: Exchange half an apple for walnuts for the same crunch but fewer calories and grams of fat.
In medium size bowl, stir together Greek yogurt, lemon juice, salt and pepper.2.
Add tuna, celery, grapes and walnuts. Stir to combine.3.
Serve as a sandwich or over lettuce.