Easy beef in black bean sauce - Good Food Middle East

Ingredients

• 2 x 250g rump steaks
• 1 tbsp cornflour
• 2 tbsp sesame oil
• 1 large white onion, cut into thin wedges
• 1 red pepper, deseeded and sliced
• 1 green pepper, deseeded and sliced
• 2 fat garlic cloves, crushed
• 1 thumb-sized piece ginger, peeled and grated
• 1-2 red chillies, finely chopped
• 5 tbsp black bean sauce
• 1 tbsp rice wine vinegar
• 2 tsp sugar
• sticky rice, to serve
• coriander leaves, to serve (optional)