Oven-baked spring rolls

Ingredients

• 2 dried shiitake mushrooms
• 2 teaspoons peanut oil
• 1 green onion, sliced thinly
• 1 clove garlic, crushed
• 250 grams pork mince
• 2 tablespoons finely chopped water chestnuts
• 50 grams chinese cabbage, shredded finely
• 1 teaspoon fish sauce
• 2 teaspoons light soy sauce
• 1 tablespoon oyster sauce
• 24 spring roll wrappers
• 1 egg, beaten lightly
• Dipping sauce
• 2 tablespoons chinese red wine vinegar
• 2 tablespoons sweet chilli sauce