Peel and core the apples, cut into wedges and slice about 5mm thick. Put the slices in salted water.
Change the water several times, then drain into a colander.
Put the apples and sugar in a medium sized pan and simmer while mixing.
When the mixture is bubbling all over and covered with a white foam, lower the heat to medium and continue to simmer.
When the moisture that has come out of the apples is almost gone, add the lemon juice and mix again.
When there's almost no moisture left in the pan, turn off the heat, mix in the cinnamon powder and it's done!
If you are using this to fill an apple pie, be sure to cool it down completely before adding it to the crust. For this pie, I doubled the recipe.
Story Behind this Recipe
My mother has been making apple pie for me for some time. Ever since I figured out the ingredient amounts I liked, I've been making it with these amounts and with this method for years.
Adjust the amount of sugar to taste. I usually use about 1/5 of the weight of the apples. The more sour the apples are, the tastier the filling will be. In our family, we also mix this with yogurt or put it on cookies or bread.