Sri Lankan Green Bean Curry

Name: Sri Lankan Green Bean Curry
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Cuisine: Asian
Ingredients: 225g (1/2 lb) green beans, slices at an angle into 5cm (2 inch) pieces; 1 tsp salt; 1 tsp ground turmeric; 2 tbsp coconut oil; 1 tsp black mustard seeds; 3 cloves garlic, roughly chopped; ½ red onion, thinly sliced; 5cm (2 inch) piece of leek, thinly sliced; 15 curry leaves, fresh or frozen, roughly chopped; 1 x 2.5cm x 2.5cm (1 inch x 1 inch) pandan leaf, cut into thin strips; 1 tsp red chilli powder; ½ tsp black pepper; 3 tbsp light coconut milk