In a mixing bowl, combine honey, soy sauce, minced garlic, ground ginger, and rice vinegar. Whisk them together until well blended.
Place the chicken thighs in the slow cooker and season with salt and pepper. Pour the honey garlic mixture over the chicken, ensuring they are evenly covered.
Add the mixed vegetables on top of the chicken in the slow cooker.
Cover and cook on low for 6 hours, or until the chicken is cooked through and tender.
Once cooked, remove the chicken from the slow cooker and set it aside.
In a small bowl, mix cornstarch with water to create a slurry. Add this mixture to the slow cooker and stir it in well.
Turn the slow cooker to high and let the sauce thicken for about 10-15 minutes.
Shred the chicken with two forks and return it to the slow cooker, stirring everything together.
Serve the honey garlic chicken and veggies over cooked rice if desired. Enjoy your meal!