Mix together the salt, pepper, garlic, and sage or thyme.
Rub over tenderloin.
Add 1/2 cup of water to slow cooker, place tenderloin in slow cooker.
Cook on low for 6-8 hours.
An hour before the roast is finished, mix together the ingredients for the glaze in a small saucepan.
Cook over medium heat and stir about 4 minutes, until mixture thickens.
Brush roast with the glaze sauce every 20 minutes for the last hour of cooking.
Serve with remaining glaze on the side - enjoy!