Preheat oven to 425 degrees Fahrenheit.

Brush a baking dish with olive oil. Sprinkle top and bottom of fish with 3/4 teaspoon salt and pepper. Be generous with the salt. Place fish in baking dish and squeeze lemon over.

In a medium bowl, combine tomatoes, olives, red onion, garlic, thyme, and oregano. Add oil, remaining salt, and a pinch of pepper. Mix to combine.

Pour mixture over fish.

Bake for 15–20 minutes or until fish flakes easily.