In a bowl add figs and 1 cups of sugar. Put into the refrigerator for at least an hour or overnight.
In a stainless steel or enamel dutch oven, on medium high heat, empty figs and sugar scraping from bowl and cook figs until they are soft. Cook stirring occasionally for 25 minutes.
With either an immersion blender or potato masher break up and mash figs leaving small pieces of the fruit throughout.
Add lemon zest, lemon juice and additional cup of sugar. Mix into figs.
Add cup of plums and cook for additional 15 minutes. Bring the recipe back to a boil, then turn off heat.
Ladle fig mixture into half pint jars, wipe rims carefully, add hot lids/rings and process in a water bath for 10 minutes at a full boil.
Make 5 half pint jars.