How old are the kids?
If they are teens then they should cook a family meal once a week, if they are 5 or 6 then they can help you or DH.
Either way each person in the house gets to pick a meal that they like and that they cook.
Use your freezer effectively eg ready chopped onions can be used in a lot of things and won't go off.
Put a few 'snack meals' in the freezer for anyone who really hates the main meal, you can do things like a ploughman's lunch, in a sandwich bag put a mini pork pie, a bread roll and some cheese.
Decide which veg taste OK / better frozen than fresh. so for me, brussels sprouts, peas, sweetcorn, chopped onions. I also keep veg in the fridge so carrots, swede etc.
Use tins and packets.
When you get home with your shopping or it is delivered separate it into meals and put each meal in a bag, a carrier bag that cannot be seen through and threaten husband that if he opens them you will, well whatever you can threaten him with.
Make the meals that things go off first, so salad on the delivery day.
I live alone so buy the bags of salad, I know it's cheaper to buy separate items but they go off before I've finished them and the bagged salads are packed in nitrogen so as long as you don't open the packet they last a few days. If you want salad later in the week it might be worth trying.
Have a shelf in the fridge that anyone can raid, cheese, pickles, crackers, fruit.
Make your meal plan, put on the fridge what the meal is and who is cooking. Remind everyone on the morning and if they don't like it they can have one of the snacks from the freezer or something from the 'raid' shelf or something from a tin - but they cook it.
Cook enough of selected meal for everyone and serve any extra portions in foil containers and freeze. These frozen portions also become 'snack meals'.
Obviously you cannot freeze salad but as part of the meal planning think about what can be frozen.
Again depending on ages of children make sure they can make something to eat. Beans on toast using a toaster and microwaving the beans in a jug is simple enough for a 7 year old to make.
Good luck.