Can someone offer advice on my food shop?

Me and my partner currently average around £300 a month on our food shops, in a 5 week month we're looking at £60 a week for everything, lunches, dinners etc.

Currently we do click and collect at Tesco but i'm finding it hard budgeting whilst finding things me and him both like and ensuring we have some 'treats' to look forward to, nothing crazy just some digestive biscuits or something

Does anyone have any advise on somewhere better to shop or how I can bring the cost of my shop down. I'm finding it difficult planning 7 meals a week anyway and that takes up most of the budget and doesn't really leave room for the essentials - bread, milk, butter etc

Any help would be useful