Chicken & Mushroom Manchurian With A Twist

• 1 lb chicken (400 g), cut into cubes
• 1 egg
• 4 teaspoons garlic, chopped
• 2 teaspoons pepper
• 2 teaspoons cornflour
• 3 green chiles
• 2 coriander roots, chopped
• 2 lemongrass, chopped
• 1 large onion, cut into cubes
• 1 teaspoon dark soy sauce
• 1 chicken stock cube
• 1 teaspoon light soy sauce
• 4 teaspoons green chilli sauce
• 2 teaspoons vinegar
• 4 button mushrooms, cut into pieces

For green chili sauce:

• 4 green chiles
• ½ green bell pepper
• 2 tablespoons onion, chopped
• 2 tablespoons ginger, chopped
• ½ tablespoon cumin
• 2 tablespoons tamarind pulp
• 4 teaspoons sugar, (or 2 tsp sugar syrup)
• salt, to taste
• 2 teaspoons oil
• 1 teaspoon rice vinegar