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1
Dissolve the baking soda in about 2 quarts of cool water, and immerse the figs in the treated water in a large bowl. Gently stir to wash the figs, then drain off the water and rinse the figs thoroughly with fresh cool water. Place the figs into a large pot. Add 1 cup water, sugar, butter, vanilla extract, lemon, lemon juice, cinnamon, ginger, and cloves. Very gently stir the mixture to dissolve the sugar, keeping the figs intact as much as possible.
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2
Bring the mixture to a boil over medium heat; reduce heat to a simmer, and cook until the figs are golden brown and coated in syrup, about 1 hour. Stir gently a couple of times to keep the figs from burning onto the bottom of the pot. Add a pinch of salt, if desired, to tame the sweetness.
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3
Sterilize the jars and lids in boiling water for at least 5 minutes. Pack the figs into the hot, sterilized jars and top off with syrup, filling the jars to within 1/4 inch of the top. Run a knife or a thin spatula around the insides of the jars after they have been filled to remove any air bubbles. Wipe the rims of the jars with a moist paper towel to remove any food residue. Top with lids, and screw on rings.
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4
Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil over high heat, then carefully lower the jars into the pot using a holder. Leave a 2 inch space between the jars. Pour in more boiling water if necessary until the water level is at least 1 inch above the tops of the jars. Bring the water to a full boil, cover the pot, and process for 15 minutes.
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5
Remove the jars from the stockpot and place onto a cloth-covered or wood surface, several inches apart, until cool. Once cool, press the top of each lid with a finger, ensuring that the seal is tight (lid does not move up or down at all). Store in a cool, dark area, and wait at least 2 days before opening.
