Healthy-Ish Waldorf Salad Recipe {No Mayo!}

Ingredients

• ½ cup Greek yogurt
• 1 lemon (zest and juice)
• ½ teaspoon black pepper
• ¼ teaspoon salt
• 2 cups cooked chicken breast (diced)
• 3 celery stalks (diced)
• 1 cup red seedless grapes (halved )
• 1 cup chopped walnuts
• 1 green apple (diced)
• green leaf lettuce (for serving)