In a large heavy saucepan, combine all the ingredients, except for the Certo. Bring to a gentle boil, stirring frequently and simmer over medium heat for 15 minutes. Skim carefully, as needed. Add the pectin and bring to a boil. Cook for 1 minute at a rolling boil. Let cool, stirring occasionally.
Pour into jars and refrigerate.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.