Watermelon salad

It isn't quite the weather for it at the moment (given I've had to start scraping my car this week :-( ) but Lots has been going on about watermelons today so it reminded me... 

So this is just a note to myself, should I be lucky enough to escape this dismal climate at any point in the not too distant future. Watermelon, mint and feta salad, one of my father-in-law's specialties, is one of the nicest things you can eat once the temperature goes above about 28°C.