Immediately after vomiting, it is best to wait until the stomach settles a bit before eating. Health.com explains that when a person has an upset stomach, one of the most commonly recommended combinations of foods is bananas, rice, applesauce, and toast. This is referred to as the BRAT diet.
Bananas not only contain sugar to provide energy, but they also contain potassium, which can become depleted in the body during bouts of vomiting and diarrhea. The starch in rice helps coat the stomach lining and soothe an upset stomach. Applesauce contains pectin, which is easily digested and can help alleviate diarrhea. With its low fat content, dry toast helps fill a person up without further upsetting the stomach.