2 limes, unpeeled, cut in chunks and seeded
1/2 cup lime juice
1/4 cup cider vinegar
2 1/2 to 3 cups peeled, seeded cucumber
pinch of salt
1 package powdered pectin
4 cups sugar
Combine limes and juice with vinegar in the container of a blender. Blend until lime is cut into smaller pieces. Add cucumber and blend until the level in the blender measures 4 cups. Combine cucumber mixture in a large pot with salt and pectin. Bring to a boil and add the sugar all at once. Return to a boil and boil hard for 2 minutes. Seal in sterilized jars and process 10 minutes in boiling water.