As others have said slow cooker is a Godsend. It saves me so much time. I cook almost every meal in it. Chilli, stews, spag bol, sticky toffee pudding. I often cook extra at dinner to either eat the next day or freeze
In the morning when I am making my older children's packed lunches. I also make my own (WFH at the moment) and DD aged 3 if she is home. I find this saves me time.
Most mornings when I am doing the pack ups I also chop up any left over veg, onion and a stock cube and put the soup maker on.
I also fill up DDs water bottle for the morning if she isn't at nursery and make my self a hot flask of tea that I can take into my home office.
DD likes 'bits' on her plate, so for lunch she will often have home made soup, a mini wm bread roll with chicken cut into two, cucumber sticks, baby tomatoes and plain yoghurt. For a snack she likes cut up apple, strawberries or orange segments with a handful of dry cheerios.
I do not cook on Saturdays. This is the day when the children can choose what they want for their dinner. Eg a happy meal. DH and I will have a take away.
I always have a bag of frozen onion and frozen veg in the freezer, because I cannot waste time always chopping onion.
I always keep a few cook and m and s ready meals in the freezer for both adults and children and pad them out with veg or salad for those days when I just cannot be bothered to cook.