In a normal setting, eating regular food will only fill the belly and satisfy the feeling of hunger. If the food is something the person really wants to eat, it will also satisfy the cravings. But there is no instance where food is used to cure things immediately.
Sure, food can help you get healthy, but that's a matter of diet, and it's a different matter compared to what just happened to the King and Queen, who have just eaten the food that Elaina cooked. It was not something they had come across in their entire life. Now that they have eaten it, they are so shocked that they couldn't believe it either.
"My cold has been cured...and my cough... it's gone as well?!" the queen is flabbergasted.
"I am suddenly energized for some reason, is this what they called the effects one can receive if they try to eat the food that is cooked by Miss Zangrande?!" even the King couldn't believe it himself.
