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1
12-14 hours before you want to jam, combine the Lemon Balm and the sugar. Rub the leaves and stalk into the sugar, until it is fragrant. Allow to sit for an entire day, covered.
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2
After the sugar has rested, pick out the lemon balm stalks and any errant leaves that might be in the sugar. Prepare a water bath, and sterilize six jars, lids, and rings (or use Weck rubber seals). Sterilize any other equipment you plan to use- like funnel, measuring cup, etc.
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3
Pour the raspberries in a large non-reactive pot (I use a 10 quart stainless steel jam pan). Gently heat the fruit on low, pressing the fruit against the pan. Cook for about 10 minutes, until the raspberries are very tender and have released their juices.
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4
Take 1 full cup of the mixture and pour it through a fine mesh sieve. This filters out some of the seeds- so the jam is lightly seeded. Add the deseeded mixture back into the pan.
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5
Add the sugar and stir over low heat, until the sugar has dissolved. Increase the heat and bring the mixture to a boil. Boil rapidly for about 10-15 minutes, or until the jam passes the wrinkle test or reaches 220 degrees Fahrenheit on a candy thermometer.
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6
Allow the mixture to cool at least three minutes off the heat. Divide mixture into the sterilized jars. Process in a water bath for 10 minutes.
