In a large heavy bottomed pot, combine pumpkin, sugar, ginger, cinnamon, lemon juice and zest.
Add water and mix well.
Bring to a rolling boil and cook on high heat for 15-20 minutes until the jam pulls away from the pot.
Let the hot jam cool completely at room temperature.
Transfer to glass jars and store in the refrigerator.
Video
Notes
It is absolutely essential to use freshly grated ginger. Ground ginger will not produce the same flavor results.If the jam is too thick after it chills, you can add a little water and mix until you have the desired consistency.