If you have time on the monday why don't you cook up a few meals that you can keep in the fridge to reheat?
A pot of soup will keep in the fridge and then you can just spoon some out into a bowl and reheat in the microwave as and when you need it.
Alongside the soup, roast a chicken and take all the meat off the bone. Save some for wraps for lunches, and make a curry with the rest, this could then be eaten with rice for dinner or over a baked potato for lunch.
I am so busy during the week that I usually do this kind of thing on Sundays.
Quiche is a regular here, I usually make two or three at a time, eat one for dinner, freeze one, and save one in the fridge for lunches or another dinner in 2 days time.
Also, roasting a gammon joint for dinner, saving some for lunches sliced thin. You could roast it on the monday, slice it up and lay in a baking dish, spoon over some of the cooking juices, and cover with foil. Then keep in the fridge for 3-4 days, and when you want to have dinner, reheat in the oven with the foil still on until piping hot. If there is more than you could eat for one dinner, use the rest for lunches just wrapped in foil without the juices.