i'd agree that sitting down together to eat regularly is as important as what you give them.
usual meals in our house:
toasted cheese in the microwave (slice bread, slices cheese, 2 mins/900w) and froz peas (cooked separately)
pasta and peas, tomato sauce, cheese
beans on toast
stews - onion, a small amount of meat, carrots, green veg, beans or lentils, diced potatoes (I leave the skin on) and stock cube.
fish in the microwave - takes about 3 mins
scrambled egg on toast
baked potatoes with a variety of stuff
baked apples: remove core, fill with sugar, 20 - 30 mins in the oven - good if you're doing baked potatoes too
The rainbow is a good one. Hidden veg and all that is good but i hope ds will grow up to think a plate looks wrong without some green on it.