I've done it for a while for about £60, there are 5 of us 6 at weekends.
breakfast: cornflakes, porridge or pancakes
snack: fruit in season or discounted at aldi that week and biscuit
Lunch: soup (dead cheap to make; bag of carrots or parsnip or lentils and herbs from cuboard, ) or sandwiches and veg sticks, then fruit
snack: fruit/biscuits
dinner (cost on average £3 a day)
- spag bol or tuna or tomato or pesto or carbornra (all under £2 for 5 of us)
- baked pots and sweetcorn or cottage cheese or cheese or tuna or leftover spag bol
-lentil curry, or veg dhansak, or chicken korma
-fishfingers/fish if on offer/pots and veg
-chicken if on offer (lasts 2 days of roast and one day of risotto)
puddings: yoghurt (big pot), fruits, icecream, crumble, etc
and on and on.
can't do it with the wine/washing powder
have to plan meals and think whats on offer/discounted (often freeze stuff)
and have only done recently out of duress but hasnt been that bad.