For Fresh Ginger Simple Syrup

1. Add ginger, water and sugar to a small saucepan. Bring to a boil, stirring occasionally to dissolve the sugar. Turn off heat once it boils and the sugar dissolves.
2. Allow the syrup to steep for at least 15 minutes and strain. Chill and store in the refrigerator in an airtight container for several weeks.

For Sparkling Cranberry-Ginger Margarita

1. Add the lime juice, tequila, cranberry cocktail juice, ginger liqueur, fresh ginger simple syrup and a handful of ice in a cocktail shaker. Put on the top and shake vigorously for 30 seconds. 
2. If you would like a cinnamon-sugar rim, mix together the cinnamon and sugar on a small plate. On another small plate, add water and lightly dip the rim of the serving glass into the water to moisten. Then, swirl the moistened rim in the cinnamon-sugar mixture.
3. Add ice to the serving glass and strain the margarita into the glass. If desired, garnish with sugared cranberries. Enjoy!

For Sugared Cranberry Garnish (Optional)

1. In a small sauce pan, add 1/4 cup sugar and water over medium-high heat. Bring to a simmer and stir to dissolve sugar.
2. Once the sugar dissolves, stir in the cranberries and turn off the heat. Make sure they’re well-coated with the simple syrup.
3. On a large plate, spread the remaining 1/4 cup sugar. Drain the cranberries and roll in the sugar. Allow to set on a wire rack for about an hour.