1. 1. Prepare the Pork Tenderloin: Pat the pork tenderloin dry with paper towels. Place the tenderloin into your slow cooker insert.

2. 2. Whisk Together the Sauce: In a medium bowl, whisk together the soy sauce, honey, apple cider vinegar, minced garlic, and grated fresh ginger until well combined. The sauce should look smooth and slightly thick from the honey.

3. 3. Pour Sauce Over Pork: Pour the entire honey garlic sauce mixture evenly over the pork tenderloin in the slow cooker. Ensure the tenderloin is mostly submerged or well coated.

4. 4. Slow Cook to Perfection: Cover the slow cooker with its lid. Cook on the LOW setting for 6-8 hours, or on the HIGH setting for 3-4 hours. The pork should be fork-tender and easily shreddable when done. An internal temperature of 145 F (63 C) is ideal for pork tenderloin.

5. 5. Thicken the Sauce: Once the pork is cooked, carefully remove the tenderloin from the slow cooker and set it aside on a cutting board. In a small bowl, whisk together the cornstarch and cold water until a smooth slurry forms. Pour this slurry into the hot liquid remaining in the slow cooker.

6. 6. Simmer and Serve: Stir the sauce well and cook on HIGH for another 15-20 minutes, or until the sauce has thickened to your desired consistency, stirring occasionally. Slice or shred the pork tenderloin and return it to the thickened sauce to coat. Garnish with sliced green onions and sesame seeds if desired, then serve immediately.