Everyone is different OP.
You can buy cheaper fruit, bananas, oranges or costly punnets of blueberries and mangoes.
You can get value potatoes or smaller packets of organic potatoes at double the cost.
We love homemade guacamole that's 3 avocados just in one side dish.
Cheap tomatoes are tasteless.
So one day last week:
Frozen salmon for one meal cost £9 for our family of 4 (2 adults 2 kids), that's just the salmon. We had garlic onion spices baby roast potatoes, peas. Teens had orange juice, H had a couple of cans of beer. About £5.75. If you add on, breakfast for teens, 4 lunches, snack after school, glasses of milk, coffees made at home, Then other consumables laundry, cleaning, showers, soaps, kitchen roll, silver foil.
It's easy to spend a lot on food now.
Have you looked at the opposite side of this, do you throw fresh food away?
And liquids are expensive, I am not going to jump on the judgemental "how much alcohol do you buy", because yes a decent bottle of red wine is £12-15, if you want one, but juices, cans, chocolate milk, it all adds up.
It's a balance between budget and nutrition. You can eat very well and cheaply but that can depend largely on how much time you have to prep, cook and clean afterwards.
If you need to cut back have a think about say 2 evening meals a week being cheaper, to begin with.