How to Make It
Preheat the oven to 475°. Season the fish inside and out with pepper. Divide the thyme, parsley and basil sprigs and garlic between the fish cavities; close the cavities with bamboo skewers. In a bowl, combine the fennel, dill and coriander seeds with the salt and water. On a very large rimmed baking sheet, make 2 shallow piles with half of the salt mixture. Set each fish on a pile and cover completely with the remaining salt, pressing to adhere.
Bake the fish for about 30 minutes, or until an instant-read thermometer registers 130° in the thickest part of the fish.
Meanwhile, in a bowl, combine the tomato, olive oil and lemon juice and shredded basil; season with salt and pepper.
Using a small hammer or the back of a heavy knife, break the crust. Brush off any salt on the fish. Lift the fish from the bones onto plates and serve with the sauce.