Remove the skin from the fish and discard any bones, then break up the flesh into a bowl.Add the cream cheese, crème fraîche, one tablespoon of the horseradish, the Tabasco and lemon juice.Mix thoroughly until well combined, then taste and add the remaining horseradish, if liked.Season and transfer to a serving bowl.
Set the bowl of pâté on a platter and add a selection of crackers.