Sizzling Beef with Black Beans and Asparagus

Ingredients

• 450g (1lb) fillet of beef
• 350g (12oz) tender young asparagus tips (1 bundle)
• 2 tbsp groundnut oil
• 1 onion, thinly sliced
• 4 garlic cloves, finely chopped
• 2 tsp finely chopped root ginger
• 2 tbsp black beans, coarsely chopped
• 3 tbsp chicken stock
• 1 tbsp Chinese rice wine
• 1 tsp sugar
• 2 tbsp oyster sauce
• 2 tsp light soy sauce
• 2 tsp Chinese rice wine
• 2 tsp sesame oil
• 2 tsp cornflour
• salt and freshly-ground black pepper
• steamed rice, to serve