If you are going to Yogyakarta, Indonesia, then I really can recommend the street food. It’s cheap, good and it’s what Indonesians are eating. There are two tips to think about though:
1) By food from a street restaurant that is only open in the evening. That means that the food will be fresh.
2) The food should be made when you are there and not some that has stored the food outside for 24 hours.
If you are following these two rules then the risk of having stomach problems has decreased considerably.