Now it’s time to prepare the syrup. Put 2.2 lbs. of sugar into a pot and add 1/2 cup of water. Cook it on medium heat and stir. When the sugar has melted and the syrup becomes transparent add watermelon rind. Cook it on low temperature and stir occasionally.
When rind pieces become transparent (like a gummy bonbons) cut a lemon into round slices and add to preserve. Cook for 10 more minutes and remove from the stove.