Well, it seems like both Soma and his dad play around with dry squid a lot in early chapters of this manga, hence I did a check the intention in which the author tries to pull off when the series reaches it conclusion. Base on my confusing between food and ***gism in this manga. I found out a very famous Japanese painting painted by the famous painter Hokusai:

http://en.wikipedia.org/wiki/The_Dre...erman%27s_Wife

Its meaning can be translated to a situation when Erina becomes a judge to test dishes of this father-son cooking contest. There is no need to explain the differentiated between father-son effect when you take a closer look at the painting.