Heat the olive oil in a large heavy based pan over a medium heat.
Add the diced red onion and cook for a few mins until softened.
Add in the garlic, ginger, cumin seeds, mustard seeds, chilli, medium curry powder and cook for 2-3 minutes.
Stir in the peppers, sweet potatoes & vegetables.
Add the vegetable stock and chopped tomatoes & coconut milk.
Bring to the boil, then cover and simmer for 10 minutes until sweet potatoes are tender.
Add in the cubed monkfish & prawns and cook for another 10 minutes, making sure not to overcook the fish.
Add a drained can of chickpeas, diced banana, then heat through and finish with the chopped herbs.
Season with salt & pepper and lime juice.
Serve with steamed rice.
