Below is the recipe which is translated from Bulgarian (with the help of google translate of course!):
Preheat the oven to 180 ° C.
Mix flour, baking powder, salt and spice in a bowl.
In another bowl, whisk the eggs, both sugars and lemon rind until a fluffy cream. Add the cooled melted butter in parts and then the applesauce.
Pour into flour with spices and stir gently, just enough to combine ingredients.
Finally, add the oats and mix again.Line muffin tray covered with muffin liners.
Fill each liner to 3/4 full.
Bake 30 minutes.
Allow to cool completely before spreading cream on top.
175g Philadelphia Light
3 tablespoons peanut butter
2 tablespoons icing sugar
Cream the cheese and peanut butter then add icing sugar until it is fluffy.
Coat muffins then decorate with coloured sugar.
For the decoration:
4-5 tablespoons sugar
few drops red colouring
Put sugar and red colouring in a ziplock bag and shake it until it turns red. Pour it into a bowl.
Roll the piece of marzipan and cut leaves into suitable shapes. Would give the edge with a knife.
Place the muffin in the bowl of red sugar. Then place two marzipan leaves in the middle and push a piece of pretzel in between them.
I found the recipe here. Although the recipe said red colouring I did use green as well to make green and red 'apples' =)