Waldorf Tuna Salad Pitas

Name: Waldorf Tuna Salad Pitas
Prep time: 10 min
Total time: 10 min
Cuisine: American
Ingredients: 5 3 ounce packages Blue Harbor tuna; 1/3 cup red seedless grapes, halved; zest of about 1/2 a lemon, about 1 teaspoon zest; the juice of 1 lemon, about 2 tablespoons; 1/2 cup homemade or clean ingredient mayo (Greek yogurt can also be used); 1/3 cup coarsley chopped walnuts or pecans; 1/2 cup diced celery, about 2 ribs; 1 medium apple, cubed (about 1 1/2 cups); 1 teaspoon kosher salt or to taste; 1/4 teaspoon garlic powder; black pepper, to taste; pitas for serving*