Boil spaghetti in water with a little oil.
Cut chicken into long and thin pieces.
Heat olive oil in a frying pan,add onion,garlic curry leaves and then chicken pieces.
Cook till they turn golden.
Add tomato puree, soya sauce, Chinese salt,black pepper, red chillies and salt, mix well

Add tomato, cook for 2 minutes and then add vinegar and butter.
Cook for another minute.
Add spaghetti in the chicken and mix carefully.
Take out in a dish, garnish with spring onion, green chillies and chat masala and serve.