We do a lot of the same things - tuna pasta (on a really lazy night I use the side dish pasta packs and add tuna and frozen vegies - my kids love it!), fritatta/omlette/scrambled eggs/baked beans with multigrain toast, chicken breast nuggets with steamed vegies. I also buy frozen chicken & vegie pies and serve these with steamed vegies and mashed potato.

I used to make a sort of 'cheats risotto' - aborio or jasmine rice cooked in the mircowave with flavoured tuna (usually tomato & onion) and grated cheese stirred through - it's surprisingly good! I actually have it for lunch sometimes. DS loves it but DD won't eat rice anymore