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1
Combine green tomatoes, sugar, raspberries, and jalapeno peppers together in a saucepan; cook and stir until sugar is dissolved and raspberries and tomatoes are broken down, about 15 minutes. Remove saucepan from heat and stir in gelatin mix until well blended.
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2
Pour tomato-raspberry mixture into a blender no more than half full. Cover and hold lid down; pulse a few times before leaving on to blend. Puree in batches until smooth.
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3
Sterilize the jars and lids in boiling water for at least 5 minutes. Pack tomato-raspberry mixture into hot, sterilized jars, filling to within 1/4-inch of the top. Run a knife or 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 and lower jars into the boiling water using a holder. Leave a 2-inch space between the jars. Pour in more boiling water if necessary to bring the water level to at least 1 inch above the tops of the jars. Bring the water to a rolling boil, cover the pot, and process for 10 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. 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.
