Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper for easy cleanup.
Slice the chicken breast into 1-inch bite-sized pieces and place them in a large mixing bowl.
Chop the zucchini into half-moons, the red bell pepper into 1-inch squares, and the red onion into wedges, then add them to the bowl with the chicken.
Drizzle the extra virgin olive oil over the chicken and vegetables.
In a small ramekin, whisk together the smoked paprika, garlic powder, onion powder, sea salt, and black pepper.
Sprinkle the spice blend over the chicken and vegetables, tossing thoroughly to ensure every piece is evenly coated in the golden rub.
Spread the mixture in a single layer on the prepared sheet pan, ensuring enough space between pieces for proper roasting.
Bake for 18-22 minutes, or until the chicken is cooked through and the vegetables are tender with slightly charred edges.
Remove from the oven and let rest for 2 minutes before serving warm.