In Greece, the flavor combination of watermelon with feta cheese has always been there, so it would hardly be considered a ‘best-kept secret’. One of my childhood memories is my grandmother’s idea of an afternoon snack: a slice of watermelon served with some feta cheese. As a child, however, I never liked the latter, so I would always eat just the watermelon (and leave the feta on the plate).   I had my first taste of a watermelon and feta salad a few years ago, when I visited the cosmopolitan island of Mykonos and had dinner at the restaurant ‘Lucky Fish’. It simply tasted of summer. The sweetness of the…