Hi
I love meal planning (how sad is that?)
You could base menus around the 3 for £10 meat offers.
Eg a chicken, beef mince and pork steaks all for £10 make 4-5 evening meals for us. You'd need double for 7 people.
Sun: roast both chickens
Mon: chicken couscous or risotto or chicken noodle soup with left overs (add peas, sweetcorn, mushrooms, spring onions or leeks etc - whatever you fancy.)
Tues: Spag bol. Make a huge ragout with lots of added veg: peppers, onions, courgettes, mushrooms, tomatoes.
Wed: Chilli. Add lots of kidney beans and smoky paprika to ragout left overs and have with rice or baked potatoes and salad.
Thurs: Pork steaks. Eg cooked in wine with sliced fennel, red onion, apple and served with rice or mash and steamed greens or fry with chips, peas, carrots etc.
Friday: home made marguerita pizzas with salad. Add spicy sausage if you want.
Sat: kedgeree or fish goujons or salmon in soy and lime with stir fry veg and sticky rice or noodles.
Work out packed lunches in a similar way:
Monday - humous salad wraps, Tues ham salad sandwiches, Wed: bagels with cream cheese and salad, Thurs cheese and onion pasties.
Buy fruit, yoghurts, snacks, drinks etc according to how many you need that week.
Breakfast - eggs for pancakes or scrambling, oats for porridge, whole meal sliced bread for toast, 2 choices of cereals etc.
I reckon you could easily get all this plus the basics for £150-60 at most supermarkets, saving well over £50 per week if you spent 200 and have already run out of food.