Vegetarian oyster sauce

From The Vegetarian Cookbook

• 300 ml cup soy sauce
• 50g sugar
• 200 ml sake (or sherry will do)
• 1 green onion, finely chopped
• 1 piece ginger, thinly sliced
• 15 g cinnamon
• 1 piece star anise
• 15 g dried orange peel

Put everything into a saucepan bring to boil, and simmer for an hour. Refrigerate, use within 4 weeks