Tri-colour capsicums and chicken stir fry ? for chinese new year

Ingredients

• 500 g chicken breast
• 1 red capsicum
• 1 green capsicum
• 1 yellow capsicum
• 1  medium carrot
• 1 whole onion
• a bunch of coriander
• 1 thumb size ginger
• 100 g green beans
• 1 teaspoon crushed garlic
• 1/2 cup soy sauce
• 1 teaspoon sugar
• 1 tablespoon flour
• 2 tablespoons hoisin sauce
• 2 tablespoons ketchup
• 1 tablespoon Oyster sauce
• water