Creating the perfect Crockpot Teriyaki Chicken Thighs can be straightforward by following these simple steps:

1. Prepare the Sauce: In a bowl, whisk together the soy sauce, honey, rice vinegar, brown sugar, minced garlic, grated ginger, sesame oil, and crushed red pepper flakes (if using).
2. Arrange Chicken Thighs: Place the chicken thighs in the bottom of the crockpot in a single layer.
3. Add Sauce: Pour the teriyaki sauce over the chicken, ensuring they are well coated.
4. Cover and Cook: Cover the crockpot with its lid and set it to cook on low for 4 to 6 hours or high for 2 to 3 hours, until the chicken is tender and cooked through.
5. Thicken the Sauce: About 30 minutes before serving, mix cornstarch and water in a small bowl to create a slurry. Stir this mixture into the crockpot to thicken the sauce. Let it cook for an additional 30 minutes.
6. Check Temperature: Ensure the chicken reaches an internal temperature of 165°F (75°C) before serving.
7. Garnish: Before serving, sprinkle sesame seeds and chopped green onions on top for added flavor and presentation.

Following these steps will guide you in creating this amazing dish effortlessly.