Caribbean Fricassee

Name: Caribbean Fricassee
Ingredients: 2 large green bananas; 4 tbsp coconut oil; 4 tbsp red onion, finely diced; 2 tbsp minced garlic; 2 tbsp finely diced ginger; 4 mild chillies, deseeded and finely diced; 3 tbsp madras curry powder; 400ml coconut milk; 100ml water or light fish stock; 16 king prawns, shelled and deveined with the tail left on; 1 cup diced pineapple flesh; 4 spring onions, white part removed and greens chopped; 3 tablespoons finely chopped celery leaves; Salt and pepper to taste; Toasted coconut flakes, to garnish