Wash the apples well, then core and roughly chop. Place in a large pot, then add the water and lemon juice.
500 grams apples, 50 ml water, 1 tablespoon lemon juice
Heat over medium-high to bring the mixture to a low boil, then reduce the heat to low and cook, covered, for about ten minutes.
Once the apples are very soft, remove from the heat. Purée with an immersion blender or wait for the mixture to cool and blend in a blender or mash by hand.
Store applesauce in the refrigerator for up to a week for freeze for several months.