Peppercorn sauce

beef stock (water, yeast extract, beef fat, beef bones, salt, concentrated tomato, concentrated carrot juice, ground black pepper, tomato paste, beef, onions, carrots) double cream (milk) (12%), cornflour, butter (milk) (4.5%), onions, brandy (2.5%), pink peppercorns, green peppercorns, cracked black pepper, salt, olive oil, ground black pepper, flavouring