BBC Food - Recipes - Clear noodle soup with red snapper

Ingredients

• 1 red snapper trimmings (head, tail, bones)
• ½ onion , peeled, sliced
• 500ml/18fl oz just-boiled water
• 100g/3½oz noodles , cooked according to packet instructions, drained
• butter , for greasing
• ½ red snapper fillet, skin slashed
• salt and freshly ground black pepper
• 1 tbsp soy sauce
• 1 tsp sesame oil
• pinch ground ginger
• 1 tbsp chopped chives
• 1 tbsp chopped fresh coriander leaves