A general thought that I should make one at some stage was clarified by this post about a bad one in London. I decided that I needed to have a go at making a good one.
I seasoned a beaten egg with some salt and black and cayenne peppers, and tossed some raw prawns through it, leaving them to sit for about half an hour. I drained the prawns from the egg and dredged them in a mixture of 2/3 cornmeal/ 1/3 self-raising flour, seasoned with more salt and pepper.
I fried them in deep hot oil for a couple of minutes, until they were crisp and golden, and drained them well on kitchen paper.
I made a dressing of garlic mayonnaise, chopped dill pickles and chopped pickled jalapenos, loosening the mixture slightly with a dribble of pickle juice and adding a touch of sugar for that all-American diabetes kick.
I piled shredded iceberg lettuce into split baguettes, then added my dressing and a pile of the freshly cooked prawns.
And... they didn't quite work. My home-made sourdough baguettes were entirely too "robust" for the sandwich. It really needs a lighter, fluffier crumb and a thin, slightly crackling crust. I don't know how to make bread like that. I will have to do some more research before I try again.
The sandwich filling was good though!