In a small bowl sift together the flour, the baking powder, the granulated sugar,
the ginger, and a pinch of salt.
In a bowl combine well the pineapple, the banana, the milk, and the egg; add
the flour mixture, and stir the batter until it is combined.
In a kettle heat 1 1/2 inches of the oil until it registers 375 degrees F on
a deep-fat thermometer, drop the batter by tablespoonsful into the oil in batches,
and fry the fritters, turning them, for 1 to 1 1/2 minutes, or until they are golden.
Transfer the fritters with slotted spoon to paper towels to drain and sift the
confectioners' sugar over them.