in the winter its easy, i just prepare something to cook slowly the night before, e.g a beef stew, chicken casserole, shepherds pie and then put the oven on at about 3ish to cook slowly ready for everyone to eat at about 6 (dh usually late home so will have his later). i sometimes do a chilli or a bolognaise the night before and then just do the pasta and rice on the night.
in the summer its mainly salads, jacket potatoes, cold pasta dishes (cook pasta night before and then chill in the fridge and serve with salad or dress it when you want it)
on the nights when i have'nt had time to prepare something then it is sonmething quick like an omelette.
at the weekends it is different because dh is here to keep an eye on the kids and i can ge on and cook something nice, usually steak etc.
tbh the kids are uusually ok playing on their own when i am cooking, but i started the pre preparation because of wanting to spend my evenings with the kids rather than be in the kitchen, so used to do the prep when they were in bed, it doesn't take ong and i don't watch soaps so wasn't missing anything and now i'm back to work i have carried on, becaus ethen i know that can go home to something prepared and won't fall for the old take aways and ready emals (although still do occassionally, i'm no nigella!)