Fried watermelon and prosciutto with sweet balsamic

I think I invented this dish when I was asked to appear on Saturday Kitchen and persuade viewers that watermelon was worth eating. It was delicious, so I hope I succeeded. But I’m nervous of claiming originality ever since, in the seventies, I thought I’d invented Stilton soup (I’d just been on a press trip to Denmark and eaten Samsoe soup, and had concluded it would be even better with Stilton). I served it at Leith