If you're out for a long day or an overnighter, I can highly recommend this:
Pre cooked and cut sausages with tilda boil in the bag rice and an oxo cube.
stick the sausages in the steamer part of the billy can to heat while boiling the rice in the main part of the billy. When the rice is done, empty a little of the water out and crumble the oxo cube into it then mix it all up together.
I had this at the greenhorn course and it was really nice and filling doesn't begin to discribe it.
Cooked sausages easily keep for a few days and can be packed into a small container and the rest take up hardly any room or weight.
anyway... dull and not very bushcrafty but It's quite tasty and really filling... gets my vote.