Preheat oven to 180°C. Line a 12 cup muffin tray and set aside.
In a bowl, combine the flour, sugar, cinnamon and salt and mix.
In a jug, combine the egg, milk, vanilla, oil and pie apples.
Fold the wet ingredients into the dry ingredients using a spatula until all ingredients are just wet.
Using a 1/3 cup measure, fill each muffin cup and smooth the top.
Bake for 22-25 minutes. Leave to cool in the tray for 5 minutes and then transfer to a wire rack to further cool.