Coat a fillet of barramundi (easily found in any Woolies) in olive oil and then place it on a sheet of al foil. Pour a LOT of lemon juice onto the fish (such that the fish is sitting in it - you'll need to fold up the al foil so that the juice stays in place). Then add some salt and pepper as well as some herbs (whatever ones you like) on both sides of the fillet (while it's sitting in the lemon juice). After that fold the rest of the aluminium foil around the fish tightly, and wrap more al foil around the fish until it's liquid-tight. Preheat the oven to 200°C, and then bake the fillet (in the foil) for ten minutes on both sides, for a total of twenty minutes. Serve with some lamb chops (which you only need to fry in olive oil until both sides are just seared, before adding salt), rice and salad.