1 1/2 pounds free range organic chicken tenders
5 cups water
1 3/4 cups reduced-sodium chicken broth
1/3 cup plain yogurt
1/3 cup mayonnaise
1 tablespoon Dijon mustard
1 cup seedless grapes, halved crosswise
1 cup coarsely chopped walnuts (3 ounces)
3 tablespoons drained capers, chopped
Toss chicken with 2 teaspoons salt.
Bring water and broth to a boil in a large saucepan, then add chicken and cook at a bare simmer, uncovered, stirring occasionally, until just cooked through, about 5 minutes.
Drain and cool, then tear into 1-inch chunks.
Meanwhile, stir together yogurt, mayonnaise, and mustard.
Stir chicken and remaining ingredients into dressing with salt and pepper to taste.