Preheat your oven to 450°F (230°C). Line a large baking sheet with parchment paper or lightly grease it with olive oil.
Place the cubed chicken on one side of the baking sheet. Season with garlic powder, black pepper, and chili flakes. Sprinkle the flour over the chicken and toss until evenly coated. Drizzle with 2 tablespoons olive oil and toss again.
Add the broccoli or asparagus to the other side of the baking sheet. Toss with the remaining olive oil, salt, and pepper.
Bake for 10–15 minutes, or until the chicken is cooked through and the vegetables are tender-crisp.
While everything cooks, whisk together the tamari, lemon juice, honey, grated garlic, gochujang, green onions, and sesame oil until smooth.
Remove the vegetables from the baking sheet and set aside. Pour the sauce over the chicken and gently toss to coat every piece.
Return the pan to the oven and bake for another 5 minutes, allowing the sauce to caramelize beautifully over the chicken.
Serve the 30 Minute Honey Garlic Chicken with the roasted vegetables, a sprinkle of sesame seeds, and extra green onions. Pair with steamed rice, quinoa, or noodles for a complete meal.