Combine bourbon, juice, and syrup in a cocktail shaker filled with ice. Shake and strain into an old fashioned glass with crushed ice. Top with soda, and garnish with fresh cranberries.
Ginger Simple Syrup
Place 1 + 1/3 cups water in a small pot and bring to a boil. Peel thumb-sized piece of fresh ginger and cut into smaller chunks. Add ginger to water and boil with lid on for 20 minutes. Then remove ginger and stir in 1 cup of white sugar until completely dissolved. Refrigerate simple syrup and use as needed.