When reminded of his injury, he then continued: "That was the one time I cooked naked! It's amazing how powerful convection oven steam can be. It felt like a good idea at the time."
The chef, who owns 48 restaurants in the UK and has had more than 30 cooking programmes on TV, has just released a new cookbook, called 5 Ingredients.
It's a recipe book where every dish only uses five ingredients, with a focus of course on cooking healthy and nutritious meals.
In between his books, TV shows and restaurant ownership, he is also a doting father to five: Poppy Honey, 15, Daisy Boo, 13, Petal Blossom, seven, and Buddy Bear, six, with the youngest, River Rocket, only born last August.
Admitting he is an 'embarrassing' dad, he says he's also guilty of 'child abuse' - because his kids were the last in their year to be given their own mobile phone.
The TV star, who has married to wife Jools for 17 years, finds being a father to two teenagers especially tricky - particularly now they have begun to be 'very interested' in boys.
But the chef says there have been 'no boyfriends' as yet - and there won't be for a while if he has anything to do with it.
He said: "It's weird. You have a little girl until about 12 and then [clicks fingers] different league.
"We've consciously tried to slow things down - there's no rush right?"
Despite the trials of being a father, Jamie has not ruled out the possibility of having a sixth baby - though he does admit he's run out of room in the car.
Giving himself a "six out of 10 as a dad to teenagers," he told the Daily Telegraph: "I think at 42 you're pushing your luck. I haven't got any more room in the car, so we'd have to buy a bus.
"But Jools would love me to say 'never say never.' She'd tell me not to rule it out."
The talented chef is worth an estimated £150 million ($267m). But it was revealed yesterday that a series of unprofitable projects with friends cost him a large chunk of his fortune.
He is now reportedly worth £90 million less than he was in 2014 due to a series of "poor collaborations," not saving anything and the 2008 global recession.
Jamie said he has "lists of friends that I shouldn't have collaborated with," warning: "Never mix business and pleasure."
