Preheat oven to 425 degrees. Coat a baking sheet pan with cooking spray.
Place the fish, skin side down, on the prepared pan. Sprinkle with the salt and pepper.
Whisk the mustard, lemon juice, parsley, thyme and olive oil; pour over the fish and add the tomatoes around and on the fish.
Roast in the center of the oven until fish flakes easily with a fork, about 11-13 minutes.
Nutrition per serving: 290 calories, 42 g protein, 2 g carbohydrates, 1 g fiber, 12 g fat, 2 g saturated fat, 463 mg sodium