1.Half fill a large wok with water. Bring to the boil on high.
2.Arrange oysters in a bamboo steamer basket large enough to fit wok.
3.In a small jug combine shaoxing, soy, water, sugar and sesame oil. Spoon a little sauce over each oyster and top with an even amount of ginger and green onion.
4.Place steamer basket over gently simmering water. Cover with lid. Steam 3-5 minutes (depending on size of oysters).
5.In a small saucepan on high, heat peanut oil. Drizzle oysters with hot oil to serve.
Shaoxing wine is available from Asian food stores.Note