Start by Prepping the Fish. Take a chef’s knife and scrape the scales off by going “against the grain”. This should be done near a sink or outside so you can clean up easily. It’s a lot of scales to remove. Pro tip: You can ask your fish monger to do this for you and save yourself the time and mess at home. But it’s kinda fun to do yourself too.
You’ll also want to score the fish with a knife, usually 3 slits is enough. It will prevent the fish from curling up and will allow it to cook evenly.
Get some heavy kitchen shears and remove all the fins on both sides.
Heat the oven to 400°F.
Rinse your fish and stuff the cavity opening with fresh lemon slices.
Mix the butter, minced garlic cloves, chopped rosemary and chopped thyme very well. Season well with salt and pepper.
Spread the compound butter into the fish cavity.
Drizzle the fish with olive oil and sprinkle with salt and pepper.
Place the fish in a baking dish. Bake for 20-25 minutes.
In the meantime, chop the parsley, capers, olives. Add enough olive oil to create a sauce. Serve with the warm fish.