Haha, not surprised someone asked.

Self-raising flour (or normal with a little yeast)
Water/soda water/beer or lemonade (for a sweeter version)
Or a little milk can work too
Add some salt.
Mix up into a workable dough (leave to rise if yeast has been added)
Then camp-oven that bad boy.

At times I add dried fruit and nuts, some jam or sugar...stewed apple and cinnamon, chocolate buds or herbs and cheese...Depends on what it is for. (sweet or savoury). I also use baking paper in the bottom of the camp-oven for obvious reasons.

Typically I use self-raising flour, salt and water...That's it. I'm a simple dude.