1.Clean branzino, make sure to scale and wash, keep the fish whole. In a bowl, mix the butter with the soy sauce, juice/zest of 1/2 a lemon, and 1 tablespoon parsley. Slice the other lemon into 9 slices.
2.Preheat oven to 425 degrees. Season the branzino cavities with salt and stuff 3 lemon rounds and 4 sprigs of thyme into each.
3.In a roasting pan, heat the olive oil until shimmering. Add the branzino and cook over high heat until the skin is browned and crisp, about 2 minutes per side. Drizzle with the butter mixture, season with more salt on the outside and roast for 9 minutes.
4.Finish under the broiler for 1-2 minutes. Keep an eye on it to prevent burning. Garnish with 3 tablespoons more chopped parsley and serve!