Heat apple cider, cranberries and orange slice over medium low heat until simmering. Reduce heat to low and simmer for 10-15 minutes, until cranberries have popped and are softened. Strain and reserve liquid. Stir in tea crystals and refrigerate until chilled.
Stir bourbon into apple cider and pour over ice in a glass. Top with ginger beer, rosemary and a twist of orange peel.