If you think every tiramisu recipe is the same – a little coffee, a little mascarpone, a little nostalgia – then Jamie Oliver will gently but firmly prove you wrong. His version has become a true internet phenomenon this year, because he has elevated the classic dessert to a level where you can make it quickly, without complications and with a result that smells like it came straight from an Italian trattoria. And the best part? The whole process takes less time than it takes to wash the dishes after Sunday lunch.