In a pan put oil add garlic saute then add onion saute until onion become soft then add chicken when colour changes add tomato puree or tomato paste then mix and cook for 10 min then add chilli flakes add ketchup,black pepper,salt,tandoori masala cook for 5 min more then add capsicum and olives mix it well and cook for 1 min more mixture is ready

WHITE SAUCE.
in a pan add 1 tbsp unsalted butter add 1 tbsp maida bhonify for 2 min then add 2 cups milk stirr well then add half tsp black pepper and pinch of salt then flame off and add 1 tbsp cream and 1 cup mozzarella cheese(grated)
Then stirr well..white Sauce is ready.

FOR ASSELMBLING.
Take a glass dish brush with white sauce then layer with pasta then chicken mixture now pour white sauce then cheese then again layer with pasta again chicken the white sauce grated cheese sprinkle chilli flakes...top pe olives or capsicum rakh dain jesa ap chahen...