Wash the cherries, pit them and cut them in half.

Place all the ingredients in a large pot, mix and cook over very low heat until the sugar dissolves.

Turn up the heat a little and let everything simmer until the cherries are tender.

Turn up the heat and let everything boil for about an additional 4' (jam sugar needs to boil a little while). Remove from heat and try the cold plate test*.

Let it cool and then store it in hot sterilized jars.