INGREDIENTS
1 lb
boneless, skinless chicken breasts
1
bay leaf
1
medium onion, halved, divided
1 tbsp
extra virgin olive oil
1 handful
mushroom caps, sliced or chopped
1
small rib celery, finely chopped
1/2 cup
defrosted frozen peas and carrots
2 tbsp
butter
2 tbsp
flour, plus a sprinkle to roll out dough
3/4 cup
chicken stock
1/4 cup
cream or half-and-half
1
rounded tablespoon Dijon mustard
2 tbsp
fresh thyme or dill, finely chopped
salt and pepper
8
-ounce sheet frozen puff pastry dough, defrosted
1
egg, beaten with a splash of water