Expert advice
Dr Elena Touroni is a psychologist and co-founder of The Chelsea Psychology Clinic. thechelseapsychologyclinic.com
Dr Pragya Agarwal is a behavioural and data scientist, and founder of research think-tank The 50 Percent Project. drpragyaagarwal.co.uk
I’ve lost count of the number of hours I’ve spent watching TV chefs instruct me in the art of making the perfect roast potato. Growing up, the festive season involved the likes of Delia Smith and Gary Rhodes revealing the wonders of parboiling spuds, of fluffing them in the strainer before adding them to very hot fat. Then, there was the year when, not too long ago, Jamie Oliver caused jars of goose fat to fly off the shelves after declaring it the fat of choice for roasties – but not before they had been given a
