Cooking Mode

1. Start by preheating the oven to 180ºC. 
2. In a bowl, beat the egg with the sugar. Add the plain yogurt, olive oil, and vanilla extract. Beat again and set aside. 
3. In another bowl, combine the all-purpose flour, salt, and baking powder, and mix well. Add this mixture to the previous mixture and fold in gently. 
4. Fill each cup of a cupcake pan with the batter and bake for 20 minutes.
5. Meanwhile, prepare the cupcake filling. Cut the apples into cubes and place them in a saucepan over low heat; add a little water and all the remaining ingredients. Cook until the apples are tender. 
6. Remove the cupcakes from the oven and place them on a cooling rack to cool. Once cooled, make a hole in each cupcake, but not too deep. Fill the cupcakes with the apple filling mixture. 
7. For the meringue: Using an electric mixer, beat the butter for 1 minute. Add the sugar, cinnamon, vanilla, and milk, and beat for 3–4 minutes or until you have a light, fluffy cream. 
8. Transfer the meringue to a pastry bag fitted with a star tip. Pipe the meringue onto the cooled cupcakes and decorate with the remaining filling.