Backwoods cooking is always a favourite with my Scouts.
Take a piece of meat - steak, sausage, etc. Add a bit of sauce or gravy for a "marinade", chop up half a carrot, some frozen peas and corn or fresh if available, thinly sliced potato, onion etc and a dob of butter (I add garlic to mine for extra flavour and to keep the vampires at bay) and wrap in two layers of foil, one "north-south" one "east-west", making sure both a well sealed with just a bit of expansion room. Then take an apple and cut out the core and replace with sultanas and a drizzle of honey for the healthy eaters and us calorifically enhanced individuals get Flakes or Mars Bars. Wrap the same way.
If refrigerated beforehand, this will last for one or two days without spoiling.
Get the campfire going and let it create a good bed of glowing coals (Or create a side cooking fire is usually ba better option.) and put the meals in. Put the main in for about 15-20 minutes. The apple goes in as the main comes out and usually takes about 10 minutes or so to cook. Absolutely scrumptious. Even the fussiest eaters like this because they get to pick what they like to put in it. Only rule I have is must be at least meat and two veg. Not had a vegetarian yet.
A dessert option is using a whole banana with the skin on and cutting a "wedge" in the skin on the inside curve. Again sultanas, dried apricot, fruit mix etc and Golden Syrup or honey, or M n Ms for a treat. My mouth is salivating at the thought.
I open the foil carefully on a plate and if you are careful, cleanup is a quick wipe of the knife and fork and ensure the foil is put in the rubbish. This is a great favourite for a two nighter as there is little cleanup, very little wasted water and, of course, marshmallows somehow always miraculously appear.
Cheers
Bloffy