Place the apples and pineapple in a tall pot. You want to have plenty of space on top so that it doesn't spill over the pot as it cooks.
Add the sugars and lemon juice. Pour boiling water over everything. Place pot on fire and cook, checking every so often until the apples are completely cooked and soft (they will be breaking apart-soft. The pineapple will not be as soft as the apples).
Let cool slightly and blend all together with a hand blender until smooth. Serve chilled. We love it served semi-frozen.
Recipe by Between Carpools at https://betweencarpools.com/smells-so-good-this-pineapple-sour-apple-compote-is-the-perfect-refreshing-pesach-dessert/