Clodagh McKenna Herbert on Instagram: "This is how I roast my Easter Lamb every year…. 💛 Beautiful lamb from @pipersfarm 💚 EASTER ROAST LAMB with rosemary and anchovy butter Serves 6 INGREDIENTS: 1 leg of lamb (bone in, approx. 2kg/4lb) 6 garlic cloves (halved lengthways) 3 sprigs of rosemary 3 red onions, quartered Rosemary and anchovy butter 100g butter, softened 2 tbsp fresh rosemary, finely chopped 10 anchovies, finely chopped Zest of 1 lemon Sea salt and freshly ground black pepper METHOD