Individual Chicken Pot Pies
["2 Quarts Basic Chicken Stock (recipe follows)", "1 bay leaf", "1/2 Tbsp. black peppercorns", "6 flat-leaf parsley sprigs, plus 1 tsp. finely chopped leaves", "6 fresh thyme sprigs, plus 1/2 tsp. finely chopped leaves", "2 whole chicken breasts on the bone (2 1/2 lb. total)", "2 carrots, cut into 1/2 inch dice", "2 celery ribs, cut into 1/2 inch dice", "16 pearl onions, peeled (see note)", "5 Tbsp. unsalted butter", "4 ounces small white button mushrooms", "1/4 cup all purpose flour", "1/2 tsp. chopped rosemary", "1/2 cup frozen baby peas", "Salt and freshly ground pepper", "Pate Brisee in an 8-inch log (recipe follows)", "1 egg lightly beaten"]
["In a large saucepan, combine the Basic Chicken Stock, bay leaf, peppercorns and the parsley and thyme sprigs and bring to a boil. Add the chicken breasts and simmer until just cooked through, about 20 minutes.", "Transfer the chicken to a plate.", "Strain the stock, return it to the saucepan and bring to a boil."]
["Chicken", "bay leaf", "black peppercorns", "parsley", "thyme", "chicken breasts", "carrots", "celery", "pearl onions", "unsalted butter", "white button mushrooms", "flour", "rosemary", "frozen baby peas", "Salt", "Brisee", "egg"]