Peel and core the apple, then slice into eights. Weigh the apple slices and calculate how much sugar you need.
Cut off the ends of the lemon and remove the white inner core.
Carve out the middle of the lemon.
Put the ingredients in a heat resistant bowl and mix in the sugar. Cover the bowl in plastic wrap and microwave for 3 minutes at 600W.
The water content will come out before you know it! (I use the microwave to save time.)
Move your mix to an enamel or thick pot and place on the stove. Boil the mixture down on low heat.
Here's a picture of it boiled down. To prevent burning, make sure to mix from the bottom as you continue to boil it.
Mash the apple and lemon pieces with a wooden spatula as they boil and when it looks like this, you're all done.