Marinate the lamb chops with salt, pepper, vinegar, olive oil, onion, oregano, parsley and garlic, for 20-30 minutes. Drizzle a griddle pan with Lurpak Cooking Liquid and place the lamb chops on to cook 3-4 minutes on each side or to the desired doneness.
In a separate skillet, transfer the onions mixture and add sugar. Cook until the onions turn golden, but still hold their shapes.
Arrange the lamb chops and onions on a platter, garnish with parsley and serve warm.