Here's how to make Mary Berry's chicken breasts with leek, potatoes, and thyme: You'll need a large 2.3-litre (4-pint) ovenproof dish for this recipe to ensure all the flavours blend together ...

Here's how to whip up Mary Berry's chicken breasts with leek, potatoes, and thyme: You'll need a large 2.3-litre (4-pint) ovenproof dish for this recipe to ensure all the flavours meld together ...

Here's how to whip up Mary Berry's recipe for chicken breasts with leek, potatoes, and thyme. You'll require a large 2.3-litre (4-pint) ovenproof dish to ensure all the flavours blend together ...

Here's how to prepare Mary Berry's recipe for chicken breasts with leek, potatoes, and thyme. You'll need a large 2.3-litre (4-pint) ovenproof dish to ensure all the flavours meld together ...