Make this easy shepherd's pie recipe of a wintry evening – it's comfort food at its best. This one has a secret ingredient for extra savouriness. Don't worry about making it look fancy ...

To cook from frozen, defrost the meat and mashed potato in the fridge overnight and assemble and bake, making sure the shepherd’s pie is piping hot all the way through before serving.

Guinness adds a rich, warming flavour that makes this cottage pie the ultimate comforting dinner. For a veggie version, see ...