Recently I have got into making pies. They are good value for money and will do a couple of dinners for two people. I prefer steak pie in various combinations, so all you do is get a pound of stewing steak (v cheap), roll it in flour, slow cook it in 3/4 pint stock/herbs/worcester sauce for two hours on a low heat. Let it cool and then add stuff - eg carrots, mushrooms, celery, spuds, parsnips. Plop it all into a dish, including the gravy, and then make some pastry to go on top. Bake it for a bit and then scoff with steamed veggies.
I also do a mean cottage/shepherds pie, I reckon a cheese and onion pie would be good, as well as chicken and leek, although I've not tried these.