I second the chook from the supermarket, usually with some salads from the deli with some chips I cook in the oven.

Or my cheat stirfry, I always keep a pack of frozen stir fry vegies in freezer and a pack of hokkien noodles in the freezer also, toss vegies in wok or pan, thaw noodles by putting in bowl and pouring boiling water over the top. I add some garlic to the vegies and some sweet chilli sauce, once its all cooked (couple of minutes) and noodles thawed I drain them and put them in the wok or pan with the vegies and toss around so that everything is covered in sauce and then its ready to serve.This seriously does not even take ten minutes its healthy yummy and filling.
If you have a bit more energy I add usually add some diced chicken or beef strips. Even prawns would go well. Sometimes I also buy the frozen stir fry vegies that have the sauce sachet in it like the honey soy pack, I still add the sweet chilli sauce so it ends up being honey soy and sweet chilli stir fry.