1. Preheat oven to 180 degrees on fan.
2. Peel and dice apples and cover with lemon juice so they don't brown.
3. In a bowl add the flour, bicarb, baking powder
4. In another bowl, mix the egg, sugar, skyr, vanilla and oil.
5. Add the wet ingredients to flour mix and add the apples.
6. Add mix into muffins cases and bake in centre of oven for 20 to 30 minutes or until they are golden.
7. Leave to cool on a wire tray then enjoy.