Chicken and cashew nut stir-fry

INGREDIENTS

• 1 free-range egg
• 1 tbsp cornflour
• pinch sea salt
• 500g/1lb 2oz skinless chicken breast
• 300ml/10fl oz groundnut oil
• 1 onion
• 1 yellow pepper
• 1 red pepper
• 3 tbsp chicken stock
• 2-3 tbsp light soy sauce
• 2 large spring onions
• 4 tbsp roasted cashew
• sea salt and ground white pepper
• steamed jasmine rice