Kremidopita, a Greek Onion Pie with Feta, Herbs and Lemon

Salty from the sea, our feet bejewelled with black volcanic sand, it was was a given during that high summer in Santorini that we would seek respite from the shimmering heat of the beach from midday onwards. A nearby taverna became our favourite. We never ventured inside. Instead we sat on little blue chairs shaded…