pavonia Hi, welcome. I have teens, and a DH. So, I am feeding 4 of us. All good advice above, but I just want to make the point that it's hard for folk that DON'T have teens to fully understand just how much teens eat, especially the male variety. I am feeding 4 adults here, one with a huge appetite.
If honest, I spend £120 pw on food. That includes cleaning and toiletries and beer. That also is for ALL meals. That's more than many on here. I know I could reduce it. However, that is £4.28 per day per person I have just calculated. Which, when you look at it, ain't so much.
I shop at Aldi and Morrisons, online for the latter. I still find Morrisons expensive but can usually figure out the offers and value products.
I try and have a cheap meal once a week, jackets, omelettes and the like, and we eat a lot of vegetarian meals. I have my fruit and veg delivered from the local market (have to buy extra fruit) and shop at the farm shop for meat, which is far better value and quality and I know where the meat has come from too.
Todays spends will be the dogs needing grooming at £60 
, however they are hairy worms and badly need doing.
Meals will be -
Sausage egg and chips.
Something using the leftover chicken.
Veg lasagne.
audits thai curry
Stuffed peppers.
Fritata.
Curry.
Chilli and nachos.
Chicken broth.
Pasta bake.
Leek, mushroom and pancetta risotto.
Gammon in coke, wedges, veg.
I've tons in the freezer and cupboards at the minute.