Preheat your oven to 400°F (200°C).
Place the chicken thighs in a large bowl and season well with smoked paprika, onion powder, salt and pepper.
In a small bowl, whisk together soy sauce, honey, olive oil, rice vinegar, garlic, and ginger. This is the marinade.
Pour 3/4 cups of the marinade over the chicken thighs, ensuring they are well-coated. Set the remaining marinade aside for later. Allow the chicken to marinate for at least 15-20 minutes. For more flavor, you can refrigerate and marinate for a few hours or overnight. I usually let the chicken marinate while I prep the veggies.
Cut the mixed vegetables into even bite-sized pieces. Arrange the veggies in a large pan or dish and generously season with smoked paprika, salt, pepper and olive oil. Mix it together to ensure all the pieces are coated with spices.
Place the marinated chicken thighs on top of or around the mixed vegetable in the baking dish. Drizzle the remaining marinade over the chicken and veggies.
Bake in the preheated oven for about 20-45 minutes or until the chicken is cooked through and the veggies are tender. TIP: Bake bone-in chicken thighs for approximately 35-45 minutes and boneless for about 20 minutes.Baste the chicken with the sauce halfway through for added flavor. Once done, baste again and broil for 2-3 minutes.
Garnish with sesame seeds and chopped green onions if desired. Serve the baked honey soy chicken and veggies over rice or quinoa.