1. In a saucepan, heat the frozen cranberry and granulated sugar over medium-low heat, stir until the sugar is dissolved. 2. Turn on the heat to medium-high, mash the cranberry while stirring and bring the cranberry mixture to boil until the sauce is thickened. 3. Turn off the heat then transfer the sauce to a bowl and let it cool completely. 4. Add about 2 tsp cranberry jam and ice cubes into a glass then fill it with soda water. 5. Cranberry mocktail is ready to spark your day!