Preheat the oven to 400°F (200°C).

Line the baking sheet with parchment paper or foil.

In a mixing bowl, combine olive oil, garlic powder, onion powder, paprika, salt, and pepper.

Rub the seasoning mixture generously over the chicken thighs.

Place the broccoli, carrots, and bell pepper on the baking sheet and toss them lightly in the remaining olive oil. Sprinkle with salt and pepper.

Position the seasoned chicken thighs on the baking sheet with the vegetables.

Bake in the preheated oven for 30 minutes.

Let it rest for a few minutes before serving.