In a medium bowl, whisk together the honey, minced garlic, grated ginger, soy sauce, rice vinegar, and sesame oil until well combined. Set aside.
Pat the chicken pieces dry with paper towels. Heat the vegetable oil in a large skillet or wok over medium-high heat. Add the chicken in a single layer (cook in batches if needed) and fry for 5-7 minutes, turning occasionally, until golden brown and cooked through.
Reduce the heat to medium. Pour the prepared honey garlic sauce over the cooked chicken. Stir to coat and bring to a simmer. Give the cornstarch slurry a quick stir and slowly drizzle it into the skillet while stirring constantly. Cook for 1-2 minutes until the sauce thickens and becomes glossy, coating the chicken beautifully.
Remove the skillet from the heat. Stir in half of the sliced green onions. Serve the honey garlic chicken immediately over bowls of hot, fluffy white rice. Garnish with the remaining green onions and a generous sprinkle of toasted sesame seeds.