Watt?

This article about Japanese food from the Guardian is nice enough, but I was particularly struck by these two sentences:

We make cucumber maki rolls, coWattal hand rolls...

I vow to take the time to prepare it properly, forsaking MSG (discovered, trivia fans, by a Japanese chemist analysing what made kombu taste Watte) for the real thing.

CoWattal? Watte? What's with the Watt?

The article is about a chef called Nic Watt. I suppose the author originally referred to him as 'Nic', then one of the Grauniad's eagle-eyed sub-editors all-changed 'Nic' to 'Watt'.
Watte work.