Most of it was home grown, so really difficult to cost. We had aubergine curry with mushrooms, red cabbage & apple, and squash (bit of an odd meal, but it was quite tasty & I was using stuff up).
homegrown elements:
squash
cabbage
aubergine
tomato
onion
garlic
apple
Very difficult to price these as the seeds cost (but last several years & some are given to me, swapped or saved) and there are other costs in growing things too: compost, manure (haven't used any in the last 12 months, but just ordered 8 tons at £60, hope it will last 2 years), allotment cost (£10pa), canes, netting, tools etc. (no idea, but it adds up). The overall cost is still probably quite low per meal (haven't bought any veg except mushrooms for months) and if you regard the growing costs as a hobby then maybe you could argue it's free. On the other hand, you could estimate £10 per week & say ~£1.50 per day.
bought elements:
spoon of curry paste (?maybe 25p)
a little olive oil for frying (umm, 10p?)
small piece (~cm cube} of ginger (dunno, 10p?)
rice (just cheapo value rice today, about 40p max)
splash of vinegar (dunno, 5p?)
mushrooms (seem to remember these were 35p on reduction)
We had muffins after too, but I can't be doing with thinking about what they cost (flour, egg, sugar, butter, home picked blackberries).
so maybe £1.25 for 4, £2.75 if include growing costs & that's still excluding the muffins. Considering I was thinking it had cost next to nothing, that's quite a lot really - more than half of the fiver thing and could easily have been quite a bit more with posh rice & normal priced mushrooms.