Steamed mussels

Name: Steamed mussels
Ingredients: 500g/1 lb 2oz fresh mussels; 2 tsp garlic, finely chopped; 1 tbsp fresh root ginger, finely chopped; 1 tsp chilli bean sauce; 1 tbsp shaoxing rice wine or dry sherry; 1 tbsp light soy sauce; 2 tsp dark soy sauce; 2 fresh red chillies, seeded and chopped; 3 tbsp spring onions, finely shredded; 3 tbsp groundnut or peanut oil; Fresh coriander sprigs, to garnish