Hi
I can spend about £50 per week for family of four which includes a 6'2 DH and two teen boys who eat for England, which includes all three meals a day. I don't do it every week, but can be done.
Using Sainsbury's normal and basic ranges:
From the 3 for £10 meat range choose the mixed thighs and drumsticks chicken pieces, the 540g minced lean beef and the 10 pork sausages
Add 1 bag of basics pasta, 1 of spaghetti and one of rice
3 packs of chopped tomatoes, 2 tins of kidney beans
1 mozzarella ball
1 bread mix
3 Onions, 6 mushrooms, 1 courgette
Bag of frozen mixed veg
A big curly lettuce and cucumber
tinned sweetcorn
part baked french loaves
That whole lot comes to under £10, and from it you can get:
Spag bol one night
Chilli beans (with some of the bol meat stirred in) and rice next night
Roast chicken thighs with rice and mixed veg
Home made pizzas with salad
chicken noodle soup with sweetcorn and fresh french bread
sausage and bean casserole with rice
Not exactly exciting but healthy and only £10 for 6 family meals.
Add eggs, milk, tea, coffee, cereal, butter, apples and oranges, cheese, tuna - using the cheapest available options, 2 loaves basics wholemeal bread etc plus very cheap treats like basics choc mousse (usually about 30p for four, which have identical ingredients to their normal mousse) and you can feed the whole family for £40-50 per week, including all meals very healthily. The problem is it gets monotonous. But it can be done.
The following week, swap one of the meats for the pork steaks, and add the frozen white fish for kedgeree and goujons, and one of the pastas for potatoes, for baking spuds one night and chips or mash the next.
Would be cheaper if veg was from the market or from the reduced section. It's definitely cheaper to buy fruit at the market.
I don't see how junk food can be cheaper. Even if you buy that cheap steak pie it would still need veg with it.