While the apples are cooking, measure a cup of apple cider into a small saucepan. Bring to a boil and allow the liquid to reduce by about a third. Remove from the heat.
In a large mixing bowl measure the flour, baking powder, salt, cinnamon and nutmeg. If using ground ginger, add it now. Use a whisk to combine the dry ingredients, creating a well in the center.
Melt another tablespoon of butter (I use the microwave). In a small bowl, beat the egg and squeeze ginger, if using, then mix in the butter.
Add the apples and egg mixture to the well in the dry ingredients. Pour over ½ cup of the boiled cider You'll have cider leftover to use in the glaze. Mix all the ingredients together until all the flour is wet.
In a large skillet, heat about ¼ inch of oil to 325-350°F/163-180°C. Working in batches, spoon about a quarter cup of batter for each fritter into the oil. Fry until the top begins to dry out and the sides have browned. Flip the fritters and fry until the fritters are gorgeous brown, about 3 minutes per side. Regulate the heat to allow the fritters to cook through without overbrowning.
Remove the fritters from the oil and drain on a rack or paper towels. Let cool slightly before glazing.