In a small bowl, blend honey, water, soy sauce, vinegar, and cornstarch until smooth and cornstarch is fully mixed.
Dry the chicken thighs with paper towels, cut into 1-inch pieces, and season with half the kosher salt.
Warm 1 tablespoon olive oil in a large skillet over medium-high heat until hot. Add chicken in one layer and cook, turning occasionally, until both sides are golden, about 8 to 10 minutes. Remove chicken to a bowl.
Add remaining olive oil to the skillet and spread zucchini evenly. Sprinkle with the remaining salt and cook without stirring until the bottom starts to brown, roughly 1 minute. Toss and cook for another minute.
Mix in minced garlic and the white parts of scallions; sauté until aroma releases, about 30 seconds.
Return chicken along with its juices to the skillet. Stir the sauce to recombine and pour it into the pan. Stir frequently and cook until the sauce thickens and the chicken is fully cooked, around 1 to 2 minutes.
Finish by sprinkling the green parts of the scallions on top before serving.