Beef noodle soup

Ingredients

• 100 g rice noodles
• 2 low-salt beef stock cubes
• 1 small onion, finely chopped
• 3 cm piece root ginger, peeled and thickly sliced
• 1 red chilli, deseeded and thinly sliced
• 1 cinnamon stick
• 1 star anise
• 230 g frying steak, trimmed of any visible fat
• 150 g beansprouts
• 235 g pak choi, thickly sliced
• 2 tbsp fresh coriander leaves
• 1 lime, cut into wedges, to serve