Remove the lamb loin chops from the fridge 20 minutes before cooking.
In a small saucepan melt the butter over low heat. Stir in the garlic and cook for 30 seconds until fragrant. Set aside.
Preheat the barbecue to medium high heat. Brush the lamb chops with olive oil and season both sides with salt and black pepper. Place the chops on the hot grill and cook for 4-5 minutes on the first side.
Turn the chops and cook for another 4-5 minutes on the second side, spooning the garlic butter over the chops as they finish cooking.
Remove the lamb from the barbecue and rest for 5 minutes. Finish with a squeeze of lemon juice and chopped parsley before serving.