Coconut and Spinach Dal

Name: Coconut and Spinach Dal
Cuisine: Asian, Indian
Ingredients: 250g toor dal (split yellow lentils, available from buywholefoodsonline.co.uk); 1.2 litres water; 1 ¼ tsp salt; 1 tsp ground turmeric; 1 tbsp ghee; 1 tbsp urad dal (split black lentils, available from natcofoods.com); 1 tsp cumin seeds; 2 tsp coriander seeds; ½ tsp freshly ground black pepper; 4 dried red chillies; 50g fresh coconut, roughly chopped; 200g fresh spinach; 100ml boiling water; 1 tsp ghee; 1 tsp black mustard seeds; 2 dried red chillies; pinch of asafoetida