Using a sharp knife, split the potato down the centre, or opt for a currently more-fashionable cross in the top; season with salt and fork-in a knob of butter, then fill as you fancy. Sign up to ...

Do not, however, choose the biggest one. If you want this recipe done in around 12 minutes, you'll need an average-sized spud. Slather it in olive oil and coat it with salt. Chefs started doing this ...