What is you favourite quick-to-make (and cheap to make) but filling meal?

Over the last few weeks I haven’t spent much time at home due to work and other commitments and because I haven’t had much time to make something to eat when I am home I have been “eating on the run”. This is not very healthy (I can’t live at MacDonalds drie-thru!!) and also working out to be more expensive so I have been trying to conjur up something quickly when I do get home but cheese or beans on toast or a bowl of cereals is starting to get boring. I am also getting fed up with microwaveable ready meals. Any suggestions?