Put your mouth where your money is

[doodab]

As MS says, big bag of rice would be the obvious thing.

Less obvious is that you would probably have to save up for it.

I've just blown my weekly budget on breakfast.

[vetran]

Mmmmmmmmmmmm.

Mans hearts.

Mmmmmmmmmmmm.

FTFY

[Old Hack]

As long as it wasn't £1 a day i.e. you could buy for a week, then it's very doable. Get pulses in, cheap veggies, and you could make soups, lentil bakes, stews, all veggie. I could make a butternut squash and carrot soup that had 6 portions for around £2, could make a lentil and tomato soup with 8 portions for the same and there are plenty more recipes. I think you could do it fairly easy if you planned for a month, so could buy little extras, like salt, pepper, etc, etc.

Not exactly the most stirring diet in the world, but you'd live (and fart like a pro)...