Cut apples into approximately 1 inch cubes.
Add all ingredients to pot, and turn heat on high. Bring to a boil, then cover and reduce heat to low. Simmer for 20 minutes or until the apples have softened significantly. Half way through simmering, you may add sugar or other sweetener if you desire.
Stir frequently, making sure that the apples are not sticking to the bottom of the pot. Add more liquid if necessary. Remove lemon slices.
Mash with a potato masher or use a food mill for a smoother consistency. Serve warm or at room temperature.