Peel the oranges, removing as much of the white pith as possible.

Puree the oranges with an immersion blender or regular blender.   

Place orange puree in a saucepan and add sugar and spices.

Simmer the orange puree over moderate heat until it thickens into a jam, about 20-30 minutes.  Test for consistency on a plate that's been kept in the freezer.

Pour the orange jam into prepared canning jars and either store in the refrigerator or process in a water bath canner for 10 minutes.