Begin by removing the rind from the watermelon to make 900gm worth.
Peel all the green part of the watermelon off completely until only the white part and a little bit of red flesh remain.
Chop the rind into small cubes and add into a big pot with enough water to just cover, along with the juice of 2 lemons. Use a plate to weigh the rind down and let it soak for 1 hour.
Remove the water from the pot and add in the sugar and cloves. Heat on medium heat until the sugar melts and the watermelon steeps out its liquid. Bring to a high simmer and allow it to simmer for 2-3 hours.
The desired result is a golden sweet with a bit of a bite, resembling a Greek candy. Stir in some extra lemon juice at the end if needed for color and balance.