Par boil the green beans in boiling water with a pinch of salt for about 1-2 minutes. Drain and trim off the stem ends from the beans. Cut them into 4-5cm (1½-2") lengths.
1. You can substitute sake with Chinese cooking wine or sherry.
2. Chilli Bean Sauce is readily available in large supermarkets. It can be substituted with sriracha or sambal oelek, or even finely chopped fresh chillies.