Singapore noodles

Name: Singapore noodles
Ingredients: 300g/10oz pork tenderloin, trimmed of fat and sinew; 3 tbsp dark soy sauce; 2 tbsp dry sherry; 2 tsp soft light brown sugar; ½ tsp chinese five spice powder; 3 tbsp sunflower oil; 100g/3½oz fine egg noodles (vermicelli egg noodles); 1 red onion, cut into thin wedges; 1 red pepper, deseeded and sliced; 100g/3½oz shiitake mushrooms, sliced; 2 garlic cloves, crushed; 20g/¾oz fresh root ginger, peeled and finely grated; 2 tsp medium madras curry powder; 200g/7oz prawns; 10 spring onions, trimmed and sliced diagonally