Comfort chicken curry

Name: Comfort chicken curry
Prep time: 10 min
Cook time: 1 h
Total time: 1 h 10 min
Cuisine: Indian, Asian
Ingredients: 1 brown onion, chopped; 2 garlic cloves, chopped; 3 tsp chopped fresh ginger; 1 fresh long green chilli, deseeded, chopped; 36.40 gm peanut oil; 20.00 gm mild Indian curry powder; 10 chicken lovely legs; 500g sweet potato, peeled, coarsely chopped; 375ml (1 1/2 cups) chicken stock; 125ml (1/2 cup) coconut milk; Steamed basmati rice, to serve; Sliced fresh long green chilli, extra, to serve