Chargrilled lamb with green olive salsa

Ingredients

• Green olive salsa
• 1 cup (120g) pitted green olives, finely chopped
• 2 tablespoons extra virgin olive oil
• 2 tablespoons chopped mint
• 2 tablespoons chopped flat leaf parsley
• 1 tablespoon finely diced red onion
• 2 anchovies, finely chopped
• 1 clove garlic, finely chopped
• Chargrilled lamb
• 1/2 cup (125ml) extra virgin olive oil
• 2 tablespoons rosemary leaves, plus extra to serve
• 1 clove garlic, sliced
• 4 200g lamb eye of loin
• 4 waxy potatoes, such as desiree
• 1 tablespoon snipped chives