In a heavy saucepan, combine all the ingredients. Bring to a gentle boil, stirring frequently. Attach a candy thermometer in the centre of the pan and simmer for about 1 hour and 15 minutes or until the thermometer reads 104 °C (219 °F). Skim carefully and stir frequently while cooking.
Pour into sterilized jars. Freeze or sterilized according to the sterilization technique (see article Sterilization 101).
Unsterilized jars keep for a few weeks in the refrigerator. This Green Tomato Jam can be eaten on toasts or croissants for breakfast.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.