Place half of the sugar, the pineapple juice, and the ginger in a nonreactive saucepan. Bring to a boil, stirring to dissolve the sugar. Boil for 1 minute. Remove from the heat and let steep in the saucepan for at least 30 minutes.
Reheat the syrup to about 150°F(65°C). Beat the egg yolks for a few seconds to combine, then gradually strain the hot syrup into th