geography: Denmark, Norway and Sweden combine to make what ?

Questions

what is the title of peter shaffer's play about mozart, also made into a film?

french bread filled with meat, cheese and salad is called a what?

which biscuit is named after a french royal family?

what is the dish of chopped avocado with onions, tomatoes, chilli and seasoning called?

what is the drink 'southern comfort' flavoured with?