Upgrade your jacket potato game with this foolproof recipe from the queen of baking herself. Over recent years, the humble jacket has had a huge makeover - re-popularised by viral food trucks like Spud Man that garners endless queues everyday, and has even served the likes of Ryan Reynolds and Hugh Jackman. Of course, jackets needs to be ultra crispy on the outside with a creamy, fluffy inside - otherwise you may as well throw it in the bin or turn it into mash. When it comes to fillings, it's