@ Oliver: This can be cleaned up in under an hour, which still leaves an hour unexplained.
Can't it be that the diner is made when the cousins are called or when everyone is present? that would also take some time to make....
Because I'm sure they would like to eat their meal when it's warm, and if they have to wait like 2 hours the food would be cold and I dont think Gohda would put his precious/hard work food in a microwave so it's all warm again