Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Chop the zucchini, bell pepper, and broccoli into uniform, bite-sized pieces to ensure even roasting.
Place the vegetables on the baking sheet and toss with 1 tablespoon of extra virgin olive oil, 0.25 tsp sea salt, and 0.25 tsp dried oregano.
Roast the vegetables in the oven for 18-20 minutes, tossing halfway through, until they are tender and slightly charred at the edges.
While the vegetables roast, pat the chicken breast dry and season both sides with the remaining sea salt, black pepper, garlic powder, and oregano.
Heat the remaining 0.5 tablespoon of olive oil in a heavy-bottomed skillet over medium-high heat.
Place the chicken in 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 3-5 minutes to lock in the juices.
Slice the chicken and serve it alongside the warm roasted vegetables for a clean and satisfying meal.