Slice apples into roughly 2x2cm pieces and discard the cores. I kept the skin on as that’s where most of the goodness is!
In a large pot, combine apples, water, apple cider vinegar and lemon juice. Cook over medium heat, stirring occasionally, for 25-30 minutes. The apples should be soft to the point of breaking apart
Strain any remaining liquid. Add sugar, cinnamon and nutmeg, and stir well
Use a masher to grind the apples into a chunky mixture. This took me around 10 minutes as I’m not especially strong. Mashing by hand gives it a much thicker texture, which I prefer. If you'd rather have smooth apple sauce, then puree the mixture in a blender
Store in a glass jar or freeze for up to 3-4 months