Excerpted from Preserving with Pomona’s Pectin by Allison Carroll Duffy (Fair Winds Press, June 2013).
Yield: 4 to 5 half-pint (8-ounce) jars.
Before You Begin: Prepare calcium water. To do this, combine ½ teaspoon calcium powder (in the small packet in your box of Pomona’s pectin) with ½ cup water in a small, clear jar with a lid. Shake well. Extra calcium water may be stored in the refrigerator for future use.
Wondering what calcium water is? Calcium water is a solution of the monocalcium phosphate powder (food-grade rock mineral source) that comes in its own packet with every purchase of Pomona’s Pectin. The Pomona’s Pectin directions tell you how to make calcium water with the calcium powder. Pomona’s Pectin recipes call for calcium water because the pectin is activated by calcium, not by sugar. You can read more about calcium water here.
Wash your jars, lids, and bands. Place jars in canner, fill canner 2/3 full with water, bring canner to a rolling boil, and boil jars for 10 minutes to sterilize them. (Add 1 extra minute of sterilizing time for every 1000 feet above sea level.) Reduce heat and allow jars to remain in hot canner water until ready to use. Place lids in water in a small sauce pan, heat to a low simmer, and hold until ready to use.
In a separate bowl, combine sugar and pectin powder. Mix thoroughly and set aside.
Can Your Preserves: Remove jars from canner and ladle jam into hot jars, leaving ¼ inch of headspace. Remove trapped air bubbles, wipe rims with a damp cloth, put on lids and screw bands, and tighten to fingertip tight. Lower filled jars into canner, ensuring jars are not touching each other and are covered with at least 1 to 2 inches of water. Place lid on canner, return to a rolling boil, and water bath process for 10 minutes. (Add 1 extra minute of processing time for every 1000 feet above sea level). Turn off heat and allow canner to sit untouched for 5 minutes, then remove jars and allow to cool undisturbed for 12 to 24 hours. Confirm that jars have sealed, then store properly.
Grate That Ginger!
Using a paring knife or a vegetable peeler, slice the thin, brown skin off a chunk of fresh, firm ginger root. Then, using a fine mesh grater, grate the ginger root. Don’t peel the whole root at once—continue to peel as you go along, so that you don’t peel more than you need. Grating the ginger will create a good bit of juice; be sure to incorporate it into your measured quantity of grated ginger.