Sacha wrote:
But don't all the nook and crannies provide the perfect hiding places
for all the caterpillars.......... somehow, I never fancy eating it
when a few boiled caterpillars have floated to the top of the pan. And
if I've spotted them in advance, I never seem to manage to get them all
out!
Soak cabbage and caulis in cold salted water before re-washing and cooking!

A good plan, but I've never found it works. :-(
Perhaps I'm not using enough salt.