Oysters with leeks in lemon butter

• 1 leek, white part only
• 50 g salted butter
• salt, to taste
• freshly ground whit

Preheat oven to 220°C. Discard tough outer leaves of leek, slice in half lengthwise, trim off root and wash thoroughly under running water to get rid of any sand. Cut off 5 cm at the root ends and cut into very fine strips for a garnish. Slice remainder of leek. Melt butter in a small