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You aren't going very far so for me it's gotta be anything cured/preserved.
Pepperoni, bacon, ham, pickles, picked jalapenos, sundried tomatoes, some dense bread, some butter. Pasta with some sauce.
Stew with meat, potatoes, stock, carrot, etc. If you have a pot.
Flour + water + salt = pan cooked bread. Just slather on butter and a slice of meat.
Put some butter on potatoes and wrap them in foil to put in the coals.