Bake in the oven at 180°C for 40 minutes
Finely chop the apple with the skin on.
Add rolled oats and chopped apple to a bowl and mix well.
Add eggs and milk, then mix thoroughly.
Add baking powder, cinnamon powder, and salt to make the dough.
Lightly grease a pan or oven-safe dish and pour in the batter.
Bake in a preheated oven at 180°C for 20 minutes.