01 -  In a saucepan, combine mashed ube, granulated sugar, coconut milk, ube extract, and salt. Stir constantly over medium heat until the mixture becomes smooth and lightly thickened, about 5 minutes. Remove from heat and cool to room temperature. 
 02 -  Place shelled pistachios, whole milk, heavy cream, honey or sugar, vanilla extract, and a pinch of salt in a blender. Process until fully smooth. Transfer mixture to a saucepan and heat gently over medium-low, stirring regularly for 5 minutes. Do not allow to boil. Remove from heat and set aside to cool. 
 03 -  Divide the cooled ube mixture evenly among ice cream bar molds, filling each halfway. Freeze the molds for 1 hour until the ube layer is firm enough to support the next layer. 
 04 -  Pour the pistachio mixture over the set ube layer, filling molds to the top. Insert sticks and freeze for at least 5 hours, or until bars are completely solid. 
 05 -  Remove the bars from their molds. Optionally, drizzle each bar with sweetened condensed milk and garnish with chopped pistachios before serving.