Step 1

Heat oil in a heavy-based saucepan over medium heat. Cook onion for 3 to 4 minutes or until soft. Add curry paste and mustard seeds. Cook, stirring, for 1 minute or until fragrant.

Step 2

Add sweet potato, coconut milk and 1/2 cup cold water. Bring to the boil. Reduce heat to low. Simmer, covered, for 15 minutes or until sweet potato is just tender. Add fish and broccoli. Cover. Cook for 6 to 8 minutes or until fish is cooked through and broccoli tender. Top with coriander. Serve with rice.