Prepare the Fish: Rinse the fish (or fillets) and pat dry with paper towels. If using a whole fish, leave it intact to retain its natural juices while baking. Preheat your oven to 400°F (200°C).
Make the Cheese Paste: In a small bowl, combine the grated cheese and olive oil. Mix until it forms a thick, spreadable paste.
Coat the Fish: Spread the cheese and olive oil paste evenly over both sides of the fish (or on top of each fillet), pressing it gently so it adheres to the surface.
Bake the Fish: Place the fish on a baking sheet lined with parchment paper or in a shallow baking dish. Roast in the oven for about 15-20 minutes, or until the cheese has turned golden and the fish is cooked through. If using fillets, bake for a shorter time, around 10-12 minutes, until flaky.
Season and Finish: Remove the fish from the oven. Sprinkle a pinch of salt and cumin over the top, adjusting to taste. Drizzle with a bit more olive oil to finish.
Serve: Serve immediately while the cheese paste is still warm and slightly crisp, and the fish is tender. Pair with simple sides like roasted vegetables or flatbread for a complete Mediterranean-inspired meal.