Prepare your ingredients: pat the chicken thighs dry and slice the green onions thinly for garnish.
Mince the garlic finely to release its pungent aroma.
In a small bowl, whisk together honey, soy sauce, minced garlic, rice vinegar, and sesame oil until the mixture is smooth and fragrant.
Place the chicken thighs into your slow cooker, arranging them evenly to ensure they cook uniformly.
Pour the honey garlic sauce over the chicken, making sure each piece is coated well, but avoid drowning the meat.
Cover the slow cooker with its lid and set it to cook on low for about 6 hours, or on high for 3-4 hours, until the chicken is tender and easily pulls apart.
Once cooking is complete, check that the chicken's internal temperature has reached 75°C (165°F) and that the meat is tender.
Using tongs, carefully transfer the chicken to a serving plate, letting any excess sauce drip off.
Spoon some of the remaining sauce from the slow cooker over the chicken for extra flavor and gloss.
Sprinkle chopped green onions over the top for a fresh, crisp contrast and vibrant color.
Serve the honey garlic chicken hot, accompanied by rice or your favorite side dishes, and enjoy the sticky, flavorful goodness.