Cut greens into 3-inch pieces. Bring a large pan of water to the boil and add the sugar and salt.
Add the snow peas and greens and cook for 4-5 minutes. Drain green vegetables and discard water.
Add 1 tbsp oil to the vegetables and keep covered. Heat the remaining oil in the wok and stir fry the ginger for 1 minute.
Add the green pepper and chilies and stir-fry for 10-12 minutes. Add the blended sauce ingredients and stir well. Simmer gently for 3-4 minutes.
Add the green vegetables and cook for 1 minute. Serve immediately, sprinkled with sesame oil and pepper.