Heat butter...add plain flour and cook it till slight change in the colour. now add milk and boil it and cook till nice and thick. Now off the flame...white sauce is ready.

Take another pan heat some butter add garlic onion,tomato, capsicum and saute it. Now add ketchup and cook it.

Then add white sauce, cheese, salt, black pepper, chilli flakes,oregano.Now add boiles pasta mix it properly.

Ready to serve Red And white sauce pasta.