This is one of those curries that you can make over and over again. Easy to vary by adding different side dishes, full of flavor and totally satisfying to eat. Make it vegetarian by changing the chicken to legumes if you prefer.
Place a large skillet over medium-high heat. A nonstick wok is ideal. First, add the curry paste to the pan and fry until it starts to smell. Be careful not to burn it! Add the meat and stir-fry for 4 minutes. Make sure the meat gets a layer of curry paste around it. Add the ginger, kaffir lime, sweet potato and stock and simmer for about 20 minutes with the lid on the pan.
Finally, stir in the lime juice, coconut milk, fish sauce and sugar. Warm for a few minutes before serving.
Serve the sweet potato curry with the fresh coriander and spring onions.