Ingredients For the Ube Custard Filling: 10 egg yolks, beaten [200 g] 7 oz (1/2 of a can) condensed milk [200 g] 1 cup whole milk [240 mL] 1 tbsp ube extract [15 mL] 1 cup ube halaya [240 mL] 4 tbsp softened unsalted butter [57 g] 2 to 3 drops purple food coloring For the Meringue: 10 egg whites [300 g] 1 teaspoon cream of tartar [3.4 g] 3/4 cup granulated sugar [150 g] powdered sugar for lightly dusting (to prevent sticking)