Combine icing sugar, cinnamon and water until smooth consistency
Put in the fridge
Bread
Preheat the oven at 230c
Whisk eggs and sugar together in a mixing bowl
Whisk in the butter and vanilla extract
Stir in flour, baking powder, baking soda and salt until all is well combined and the batter is thick
Fold in the apples
Pour half of the batter in the loaf pan and sprinkle the sugar and cinnamon topping
Pour the remaining batter, do the same and then use a spoon or knife to swirl the top layer
Bake first for 35 minutes and if starts to brown quickly cover with foil and bake for another 20 minutes or until completely baked
Once baked, let it cool down for 20 minutes before adding the glaze
Enjoy :)
Notes
For the bread, I would recommend this to bake for 35 minutes at first and then keep checking with a toothpick until the inside is completely baked. If the top browns too quickly, cover it with tin foil to avoid it from burning.