Vegetarian San Choy Bow

Ingredients

• ½ iceberg lettuce
• 10 shiitake mushrooms (finely chopped)
• 100 g snow peas (sliced)
• 2 small carrot (finely chopped)
• 8 water chestnuts (finely chopped)
• 8 spring onions (sliced)
• 1 long red chilli (finely chopped)
• 2 cloves garlic (minced)
• 2 tsp Shaoxing wine
• ¼ cup oyster sauce
• 1 tbsp dark soy sauce
• 1 tsp cornflour
• 2 tbsp cold water
• 1 tsp sugar
• 1 tbsp light soy sauce
• ¼ tsp white pepper
• 1 egg white
• 2 tsp sesame oil