TikTok user @Elis_Kitchen has gained more than 800,000 views with a video showing how to make mashed potato using crisps – and a Michelin-starred chef has branded it “ludicrous”TikTok user @Elis_Kitchen has gained more than 800,000 views with a video showing how to make mashed potato using crisps – and a Michelin-starred chef has branded it “ludicrous”