Preheat the oven to 175 degrees Celsius.
Line a baking pan or prepare muffin tins.
Add egg, xylitol, stevia drops and coconut oil to a blender or bowl and mix/whish until smooth and a little fluffy.
Add apple sauce, yogurt/quark and milk and mix/whish again.
Combine oat flour, rice flour, baking powder, baking soda, salt and poppy seeds in a separate bowl. Stir into the wet ingredients and mix just until combined.
Fold in the blueberries gently.
Divide the batter between the muffin tins and bake for 17-20 minutes.
Take out of the oven and let them cool before serving.