Beef in Black Bean Sauce

400g lean diced beef
1 tbsp cornflour
1 large white onion, cut into thin wedges
1 red pepper, deseeded and sliced
1 green pepper, deseeded and sliced
2 garlic cloves, finely chopped
1 thumb-sized piece ginger, finely chopped
1-2 red chillies, finely chopped
5 tbsp black bean sauce
1 tbsp white wine vinegar

1. Toss beef in cornflour.
2. Fry steak in frylight or oil for 5 mins.
3. Transfer to another plate.
4. Fry onion and pepper until soft.
5. Add chopped garlic, ginger, chillies, cook for a further minute.
6. Return beef back to the pan.
7. Add black bean sauce, white wine vinegar, water
8. Simmer until cooked through.
9. Serve hot!