Mix arrowroot powder and water together in a small bowl. Set aside.
Combine the garlic, ginger, honey, tamari, and orange juice in a small saucepan over medium heat. Bring to a simmer and then add arrowroot mixture.
Cook the sauce, stirring constantly until it has thickened enough to coat the back of a spoon, about 2 to 3 minutes. Turn off heat and let cool.
Chicken and Vegetables
Preheat oven to 400 degrees F and lightly grease a large baking sheet with cooking spray or oil.
Combine the chicken and 1/4 of the cooled orange teriyaki sauce in a large bowl. Toss to coat and let marinate while the oven preheats.
Place vegetables on the baking sheet and toss with 1/2 of the remaining orange teriyaki sauce.
Once the oven is preheated, add the chicken along with any sauce in the marinade bowl onto the baking sheet. Make sure to spread everything into a single layer.
Bake for 18 to 20 minutes, tossing halfway through. When dinner is ready the chicken will be cooked through with an internal temperature of 165 degrees F.
Remove from oven and serve with remaining sauce. Garnish with sesame seeds. Serve warm with cooked rice and enjoy!
Notes
Chicken breasts can be substituted for chicken thighs.Cornstarch can be substituted for arrowroot powder.Soy sauce or coconut aminos can be substituted for tamari.