Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Place the broccoli florets, bell pepper strips, and zucchini slices on the prepared baking sheet.
Drizzle the vegetables with 0.75 tablespoons of olive oil and sprinkle with half of the sea salt, black pepper, garlic powder, onion powder, and smoked paprika.
Toss the vegetables thoroughly to ensure an even coating of oil and spices, then roast in the oven for 20-25 minutes until tender and slightly charred.
While the vegetables roast, pat the chicken breast dry with paper towels and season both sides with the remaining salt, pepper, garlic powder, onion powder, and smoked paprika.
Heat the remaining 0.75 tablespoons of olive oil in a large stainless steel or cast iron skillet over medium-high heat.
Once the pan is shimmering, add the chicken breast and sear for 5-7 minutes per side until the exterior is golden brown and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a cutting board for 3-5 minutes to lock in the juices before slicing.
Plate the sliced chicken alongside the warm roasted vegetables and serve immediately.