Start with the potatoes. Make the incisions (hasselback technique). Put the potatoes in a oven dish. Add some salt and oil. Bake in the oven at 180° for approx 45-60 mins (depends on the size of the potatoes). Clean the fish and fill with some onion, fresh basil and lemon. Add pepper and salt. Half a few roma (prune)tomatoes. Add some garlic, pepper, salt and dried basil. After the first 30 mins of baking time of the potatoes, add the tomatoes. Add the fishes during the last 20 mins of baking time.
Serve this pure and simple dish with some lemon wedges!