Everyone’s mum, nan or dad has their very own secret way of getting perfect roast potatoes that’s been handed down through generations. And the tradition of hacks for getting crispy roast potatoes continues with this chef, who claims one simple thing will give you perfect roast potatoes every time. And that's not the only roast potato hack doing the rounds: roast potato genius Vicki from Australia shared her tip on the Mums Who Clean Facebook group, according to the Daily Star. You’ll find lots and lots of tips on how to make the perfect roast potatoes right here. Plus, another great way of getting super-tasty roast potatoes is to add Marmite.