Waldorf Chicken Salad

Ingredients:3 chicken breast halves on the bone, with skin (about 14 ounces each)2 large garlic cloves, minced1 teaspoon ground fennel seedsKosher salt and freshly ground pepper7 tablespoons extra-virgin olive oil1 cup walnut halves (4 ounces)1 tablespoon red wine vinegar1/2 teaspoon Dijon mustard2 ounces blue cheese, crumbled (1/4 cup)1/4 cup buttermilk1/2 teaspoon finely grated lemon zest1…