Cantonese Rice Noodles with Egg Gravy

Ingredients

• 500g (1 lb) fresh rice noodles sheets
• 2 tbsp vegetable oil
• 1 tbsp soy sauce
• 2 tsp dark soy sauce
• 200g (7 oz) pork fillet, thinly sliced
• 12 prawns, peeled, deveined, tails intact
• 4 garlic cloves, finely chopped
• 3 tsp finely chopped ginger
• 1 tbsp Chinese Shaoxing wine
• 2½ cups chicken stock
• 1 tbsp oyster sauce
• 1 tsp sesame oil
• pinch white pepper
• 1 tsp sugar
• 1 bunch boy choy or choy sum, rinsed, chopped into large pieces
• 2 tbsp cornflour (cornstarch), mixed with 2 tbsp water
• 2 eggs, lightly beaten