In a mixing bowl, add 300 grams chicken, 1 tbsp garlic paste, 1/2 tsp crushed black pepper, 1 tbsp oyster sauce, 1 tbsp lemon juice, 2 tbsp olive oil and salt to taste and mix well. Put aside for some time.
Add some olive oil to a frying pan and fry chicken from both sides until it is well cooked. Cut into slices when chicken comes to a lower temperature. In a cooking pot, add spaghetti and olive oil with water and boil for 10 minutes. Keep boiled spaghetti in cold water until its temperature is brought down.
Then brush with olive oil and keep aside. In a mixing bowl, add a finely sliced green chili, 1 tbsp crushed garlic, 2 tbsp olive oil, 2 tbsp tomato ketchup, salt to taste and mix well. Dressing is ready. Now in a mixing bowl, add spaghetti and finely sliced chicken with dressing and mix and serve.