Just myself, food only, I budget £25 a week, for that I eat very well, though I do have plenty of time to shop, farm shops and markets mostly. I'll often spend a fair bit less, sometimes an extra weeks money at the end of the month. I don't often have takeaways, fish and chips once a month maybe, it comes out the same budget. It doesn't include eating out, which is either a cycling cafe stop, or a social occasion and a treat, so I like to do so without considering cost.
Is it a competition? I can live on a tenner a week, but it's hard work. OTOH if I had no time and a decent income I'd probably be eating less well for twice the cost.