Jam

Pit and chop the quinces, removing the seeds

Casings and seeds for making the jelly

Place the pitted quinces in a enamel or stainless steel saucepan with the water

Bring to a boil, then reduce heat and simmer until the quinces are slightly soft

Remove from heat and blend in a blender

Return the mixture to the saucepan, add sugar, and cook, stirring constantly, until the mixture forms a ball that separates from the sides of the pan

Place into a greased mold lined with parchment paper, let cool.