Swap fresh veg for frozen. Green beans, broccoli, cauliflower spinach all significantly cheaper and perfectly fine nutritionally. Not frozen mushrooms or peppers. They arent great
Reduce fruit. Your five a day should be mostly veg not fruit. Too much sugar.
Porridge if you like it. Cereal is also cheap but we don't find it as filling.
Basics ranges are often better for you due to lower sugar content. Especially things like ice creams, cereals and chocolate chip cake bars.
Lunches go for egg based, shakahuka (cooking on a bootstrap, I add mushrooms and sometimes Brussel sprouts
) omelette, egg mayo coronation egg. Budget fish finger sandwiches are also a favourite here
.
Cooking Bacon is incredibly cheap. Good for carbonara, tomato bacon mushroom pasta, brie and bacon rissotto (cooking on a bootstrap). I buy a packet and split it down into 50g per person portion sizes.
If you really want to reduce costs Jack monroe girl called Jack cookbook/cooking on a bootstrap website will do it. A couple of recipes ive mentioned, the salmon paste pasta, mushroom strogonoff, onion soup are all pretty awesome. The salmon pasta and brie and bacon rissotto becoming staple weekly meals in itself brought down the budget.
Weigh portion sizes. Especially rice and pasta. This good for the waistline as well as the budget.