you can put meat and bread on a spit and hang it over the fire, make flat bread on a hot flat rock, use heated stones to boil water (PITA), pack leaves and mud around your dinner and place it directly in the fire(my personal favorite). There are as many ways to cook over and in a fire as there are things to cook your imagination is the limit.
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Depend on yourself, help those who are not able, and teach those that are.