Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Place the broccoli florets, sliced zucchini, and chopped red bell pepper on the baking sheet.
Drizzle half of the olive oil over the vegetables and sprinkle with a pinch of sea salt and black pepper, tossing to coat evenly.
Roast the vegetables in the oven for 15-20 minutes until they are tender and slightly charred at the edges.
While the vegetables roast, season the chicken breast on both sides with garlic powder, smoked paprika, and the remaining salt and pepper.
Heat the remaining olive oil in a large skillet over medium-high heat.
Add the chicken to the skillet and sear for 5-7 minutes per side, or until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 3 minutes before slicing.
Serve the pan-seared chicken alongside the roasted vegetable medley.