Fish Seasoning - for any fish

Bahan-bahan (4 porsi)

• 1 tsp celery salt ((or 3/4 tsp salt])
• 1/4 tsp black pepper
• 1 tsp smoked paprika
• 1/2 tsp mustard powder
• 1/4 tsp mace
• 1/4 tsp allspice
• 1/8 tsp ground clove
• 1/8 tsp ginger powder
• 1/8 tsp cayenne pepper ((or pure chilli powder))
• 1/8 tsp ground cardamom
• 750 g / 1.5lb fish fillets (, skinless, boneless (I used flathead, Note 2))
• 45 g / 3 tbsp unsalted butter
• 30 g / 2 tbsp Extra unsalted butter – for drizzling ((optional))