Thai Sweet And Sour Chicken

Ingredients

• 2 chicken breasts
• 1 red sweet pepper
• 1 green sweet pepper
• 1 onion
• 1 small tin of pineapple chunks
• 2 tomatoes
• 1/4 of a cucumber
• 2 spring onions
• 2 tbsp cooking oil
• 1 clove of garlic
• 3 tbsp tomato ketchup
• 1 tbsp white vinegar
• 1 tbsp white sugar
• 1 tsp salt
• 1 tsp pepper
• 1 tsp cornflower (cornstarch)
• 1/4 pint of water or stock