Beef and green peppers in black bean sauce

Ingredients

• 300g very thinly sliced beef

To marinade the beef:

• 1 tablespoon of vegetable oil
• 1/2 a tablespoon of cornflour
• 1 tablespoon of Shaoxhing rice wine
• 2 tablespoons of soy sauce
• 1/2 a tablespoon 3 good heaped tablespoons of fermented black beans
• Once fifteen minutesof chilli flavoured oil

To make the sauce:

• 3 tablespoons light soy sauce
• 1/2 a tablespoon of dark soy sauce
• 2 teaspoons of sugar
• 1/2 a teaspoon Chinese black vinegar
• 1 tablespoon water
• 1 tablespoon of oyster sauce
• 2 teaspoon cornflour
• 1 large onion
• 4 dried red birds eye chilies
• 2 green bell peppers
• 2 spring onions
• 1 teaspoon of sugar
• vegetable oil for frying