Chicken Salad Sandwiches without shallots

2 lbs whole bone-in skinless chicken breasts 1/2 teaspoon pepper 1 teaspoon salt 2 teaspoons onion powder 1 cup mayonnaise (approx) 2 cups finely diced celery[...]

4 chicken breast halves , bone-in, skin on (2 whole) olive oil kosher salt & freshly ground black pepper 3/4 cup good mayonnaise , plus more for the bread 1[...]

kosher salt & freshly ground black pepper 3/4 cup mayonnaise 1 1/2 tablespoons tarragon leaves , chopped 1 cup celery , small diced 1 cup lettuce , chopped 4[...]