We use our pie irons a lot when we camp, but we don't boondock. Use spray to keep the items from sticking. Use the bread of your choice, flatten it out an then add the insides. Top with another piece of flattened bread, and close up, heat over the campfire. The insides we do are: pizza pockets (pizza sauce, cheese pepperoni), manwich sandwiches (make the meat at home and freeze) add cheese, chicken pot pies (using non-condensed or drained creamy chicken soups) and others that I can't think of at this moment. We let the crust of the bread hang over the sides and the heat over the fire.
I also do pizzas on the fire grate. Place a pizza stone on the grate and then we use the Chef Boyardee pizza kits with extra toppings.
We also do lots of soups, frozen bagged meals, and many rotisserie chickens from Sam's, Walmart or other grocery store.
These are easy, quick and not expensive meals.