If you can knock up a decent sausage, bacon and eggs or a cordon bleu meal for others, you yourself will never starve abroad. If you can't cook there are plenty of dirty pots and plates to wash or beers to serve. Where Paid work will most likely only be found in developed countries.
Tourist areas are often the best bet.
Either cooking, serving or cleaning up. Long hours are normal and the pace can be hectic at busy times. An ability to cook to a desired quality or quantity, or both. Higher quality establishments will demand catering qualifications while a burger chain, for instance, will be less choosy in hiring staff. Plenty of hotel and catering schools are available to provide training.