Easy, easy, thought Jon. He had the stone. He didn't have to panic.
"I wish that my house was back exactly the way it was before I wished that we 'had something to eat in this house'."
He had to look away, and then suddenly he was inside the house again. Everything was restored.
Though he was still hungry. But then, he couldn't reverse wishes--so now that his house wasn't a restaurant any more, the wish about having something to eat must have come true in another way. There should be something to eat in the house.
After a search of the refrigerator and cabinets, though, Jon didn't find anything new. Maybe the stone took him literally? He meant 'something I want to eat', but he didn't say that, so the stone could have thought that the food already in the house was enough.
However, that turned not to be true. There was indeed something to eat in the house, because....
