Apple Cake

Hi!
I love this cake, my nana made one for me and Luigi, my hubby, last Christmas and I have decided to give it a go! Although this one has less butter and less sugar than the one she made...
You need
Three eggs
a pinch of salt
80 grams of butter
80 grams of sugar
200 grams of self raising flour
Half a glass of milk
3-4 big apples

Pre-heat the oven at 160 degrees Celsius.
Cut the apples in small pieces, and set them aside
Separate the eggs and whisk the whites (with a pinch of salt) in a very clean bawl until they form peaks (it will take few minutes)
In another bawl, add the yolks and the sugar and whisk until they  look pale.
In the meantime, melt the butter in a small pan at low heat
Add the butter to the yolks and the sugar, and  keep whisking
Carefully, fold in the whites (by hand) and then the apples.
Slightly butter and flour a round cake mould (the type you can open),  add the batter and place in the oven for 40-45 minutes (Check with a tooth-peek, if it comes out clean, the cake is ready!)
Buon appetito!