For each fillet, place in a microwave-safe dish. Sprinkle with lemon-herb seasoning and drizzle with oil. Cover dish with plastic wrap, turning back one corner to vent. Microwave on high for 1 1/2 minutes.
Uncover; arrange 2 tomato slices and a sprig of basil and oregano on fillet. Sprinkle with one tablespoon cheese. Cover and vent; microwave on high for 1 to 1 1/2 minutes or until fish flakes easily when tested with a fork. Repeat with remaining fillets.
