Nobody can.
Yeah, for 30p a day i can make sure that you don’t starve to death. That’s it. I’m certainly not great with money, i don’t “hunt” for special prices – but we do cook from scratch, every day (the last ready/microwave meal i had is years ago).
He specifically said nutritious meal, and that’s impossible. Period. If someone disagrees: you’re wrong, don’t argue. It’s factually, undeniably and guaranteed impossible to cook 7 nutritious meals for 30p a day, even if we assume an intake of 700 calories (which is a third of the average required calorie intake for a male).
It becomes even dumber if you put it differently. You need to cook an entire week for £2. It looks even more bollocks if you, yet again, put it differently. The argument is that you can cook for an entire month for £8.