Preheat the oven to 350 degrees Fahrenheit or 180 degrees Celsius

Melt butter, but be careful not to burn it. Cool it off for about 5-10 minutes.

In the meatime, peal and cut the apples into thin slices and sprinkle them with some lemon juice. Set the apples aside.

In a seperate bowl, add eggs, sour cream, sugar, and mix them all together with a spoon.

Add the melted butter, vanilla, lemon zest, and continue mixing.

Add a table spoon of sparkling water and mix.

Measure about two cups of flour, and add two tea spoons of baking powder to the flour with a pinch of salt. Mix it well together and then pour into the bowl with the other ingredients.

Mix all the ingredients together with a spoon.

Add half of the apples and mix them into the batter, gently.

Pour out the batter onto a greased and lightly breaded round baking dish.

Place the other half of the apples on top of the batter.

Bake for 40-45 minutes until golden.

Cool it off for about 10 minutes, sprinkle some powdered sugar on top, and Enjoy!