I've just checked last week's food order which was around £50 for the food excluding the cat food.
Breakfast is typically porridge oats with bit of honey to sweeten. I buy a large 1kg bag for around £1. I also have greek yogurt with some fruit and granola, I buy whatever is on offer, so this week I've had grapes, but I'll mix it up with berries. My child will have own brand cereal versions of shreddies/cheerios, less than £1 a box.
Lunch in typically something like scrambled egg on toast, a vegetable soup or jacket potato with tuna or beans.
Evening meals I've started to swap chicken breast for chicken thighs as I can buy a large pack of thighs for around £3 which stretches for 2 meals, served with rice and veg. I'll season with honey and mustard or something similar. We also have 2 veggie based meals a week to cut costs such as baked sweet potatoes stuffed with tuna and soft cheese & veg, a tomato and feta based pasta, or stuffed peppers. Then I tend to batch cook a large slow cooker meal with a meat of choice, but bulk out witth lots of veg, which again will do us 2 nights.
I always buy the basics like break, milk, cheese, eggs , beans etc and snacks include yogurt, fruit, skinny bars, ice cream.
I detest meal planning, it's so tedious and it often means we end up eating the same sort of stuff or have something twice in a row, but it's the only way I can keep the shopping bill tight and we don't waste any food. It can be done , just takes a lot of time and planning.