Rhubarb and Ginger Jam

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Rhubarb and Ginger Jam Recipe
(makes six 8-ounce jars)
Ingredients:
3 pounds of trimmed rhubarb stalks, cut into 1/2-inch pieces
3 cups granulated sugar 
1/4 cup crystallized ginger, finely chopped
1/4 cup grated fresh ginger

Combine the rhubarb, two types of ginger, and sugar in a large saucepan. Stir over medium-high heat until the sugar dissolves and the mixture begins to bubble. Once boiling, reduce the heat to medium and simmer, stirring frequently, until jam thickens. Adjust heat accordingly to maintain a steady simmer and stir often during the thickening process to prevent scorching. Cook for about 20 to 25 minutes, skimming and discarding the foam that collects on the top of the mixture.

After 20 minutes, test for doneness. Turn off the heat under the jam and take the temperature of the fruit mixture using a candy/jelly thermometer. The thermometer should read about 220 degrees when the jam is done. Alternately, place a small spoonful of jam on a plate and place the plate in the freezer for 35-45 seconds. Remove the plate and run your finger over the top of the jam. The surface should “wrinkle” in your finger’s wake. If it does, the jam is done.