Pat dry fish fillet from both sides using a paper towel and place it in a baking pan lined with parchment paper or lemon slices.
Add garlic powder, dry parsley, Italian seasoning, chilli flakes, fish seasoning, paprika, black pepper and salt in a small bowl, and mix well.
Generously sprinkle the spices and seasoning mixture on one side of the fish fillet and rub gently using your hand to make an even coating.
Drizzle olive oil and pat gently. Repeat the same procedure on the other sides of the fillet. Keep 2 or 3 lemon slices under the fish.
Place the dish in the oven and bake for 10 minutes or until flaky. Remove from oven, transfer to the serving plate and serve with your favourite garnishing and sides.