There was also an evening standard article that did the same thing and came to the same conclusions. Too much waste, expensive ingredients (loads) way too stressful in 30 minutes, is technically possible if you do really diligent prep, but probably isn't worth it.
I've watched a couple of his 30 minute shows and honestly the ingredients looks super weird, he always uses WAY too much mint for instance and always uses a TON of lemon and I don't care what they say about olive oil, using a pint of it in everything is surely no good for you (not to mention, greasy) I swear he owns a mint, lemon and olive oil company. I think he tries to add freshness back in with all that mint and lemon but that's such a cheat and just overpowering.