Chicken and Leek Casserole

Mary Berry’s chicken and leek casserole is honey-browned chicken breasts baked over leeks and new potatoes in a creamy apple, thyme and crème fraîche sauce. It serves 6 and takes about an hour and a quarter, with 35 minutes in the oven. Berry calls it Chicken Breasts with Leek, Potatoes and Thyme in The Complete …