Chicken Salad with Pickled Grapes and Celery Leaves

Name: Chicken Salad with Pickled Grapes and Celery Leaves
Ingredients: For the pickled grapes:; 1 cup whole grapes, washed; 1/2 cup apple cider vinegar; 1/4 cup water; 2 tablespoons sugar; 1/2 cinnamon stick; 1/4 teaspoon fennel seeds; 3 cardamom pods, smashed; pinch chile flakes; For the salad:; 2 tablespoons crème fraîche; 2 tablespoons brine from pickled grapes; 1 teaspoon Dijon; 3 tablespoons olive oil; Salt; 2 cups shredded or cooked up chicken; 1/2 cup thinly sliced celery leaves; 1/2 cup quartered pickled grapes; 1 tablespoon finely chopped fresh tarragon; Pepper