Potato bake: layer slices of potatoes, slices of onions and chopped tomatoes, repeat until your dish is full and cook for approx 1.5hrs-2hrs on 180 or 1.5hrs on 200.
Do you have a slow cooker, you could really utilise it and just bung some veg in and some chicken in the morning and then have chicken casserole by the evening. If you make loads you could freeze some. I know you say you don't have the time for this but think how easy it will be to pull a frozen meal out of the freezer one day when you really can't face cooking.
Stir fry: leftover veg or a pack from the supermarket with some chicken and some noodles or rice.
Soup is very easy. Leek & Potato: 2 x leeks, 1lb potatoes, 2 x onions, 2 x sticks celery, salt and pepper (saute the lot using chicken stock) and then when cooked blitz down and add a pint of milk. I love this with a french stick, feels like a treat. Sweetcorn soup: bag of frozen sweetcorn (defrost), blitz in blender with 15g semolina & 1 onion or bunch of spring onions, transfer to saucepan and add 1 pint of chicken stock and cook. Done!
Roast chicken and roasted new potatoes. Get a chicken and bung it in a tin, bung in some new potatoes too (same pan), cook for normal length of time to cook chicken. If you have some thyme to hand then add that in too, if not don't worry. Every now and then give the lot of it a shake. You could use chicken legs instead of a whole chicken but then you won't have leftovers. Will be delicious and you can use leftover chicken for all sorts. Serve with salad or veg. (Leftover chicken could be served with roasted veg and cous cous)
Meatballs, spaghetti and sweetcorn. My mum used to give us this when we were kids (was our favourite), she used the tins of meatballs you can get in tomato sauce.
Fish fingers, boiled potatoes and veg.
Lizzywig sausages (I made it up one day when I was about 17 and it's stuck). Pack of sausages chopped up, slice 2 onions, crumble in pork stock cube, sprinkle of dried thyme or oregano, if you have red wine add in a splash (I usually don't bother these days to keep cost down), add in a tsp of cornflour and done. Serve with mash and peas.
Faggots and mash and peas.