• Wash the fish fillet and marinate by applying salt and black pepper powder and keep aside for 30 Minutes in the fridge.

Let's make the Moroccan sauce:

• Take a mixing bowl and add the cumin powder, coriander powder and paprika. Mix and keep aside. Take another mixing bowl, add the chopped coriander leaves, 3/4th of the mixed spiced powders from first mixing bowl, lemon juice, olive oil, garlic paste and 1 teaspoon salt and mix well.
• Pour 3/4th of this sauce over the fish fillet and apply it on both sides of the fish. (Reserve the remaining 1/4 to pour on the fish while serving). Keep it aside for 1 hour in the fridge.

Let's make the roasted onion.

• Heat a kadai and add butter. After butter melts, add olive oil. Now add onion and saute till onion turns pinkish.
• Add the remaining spiced powders, turmeric powder and salt to taste and mix well. Now add olives and mix.
• Let this mixture cool.

Let's bake the fish:

• Pre-heat the oven at 200C for 5 Minutes.
• Spread the roasted onions in a baking dish. Arrange the marinated fish fillets over the roasted onions. Bake it for 25 Minutes at 200C.