Sri Lankan Style Pumpkin Curry

Name: Sri Lankan Style Pumpkin Curry
Ingredients: 500 g pumpkin (leave skin on); 1 medium onion (finely diced); 2 tbsp desiccated coconut; 400 ml coconut milk; 1 tbsp ground coriander; 1 tsp white pepper; 1 tsp turmeric; 1 tsp fenugreek seeds; 1 tsp hot chilli powder; 2 sticks green cardamom (smashed open); 1 stick cinnamon; 6 curry leaves; salt (to taste)