
2 medium English cucumbers (about 1 pound total)
2 small shallots, peeled
5 whole cloves
1 teaspoon mustard seeds
1 teaspoon celery seeds
1 cup water
1 cup apple cider vinegar
¼ cup granulated sugar
1 tablespoon coarse kosher salt
1 tablespoon packed light brown sugar
½ teaspoon crushed red pepper