Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Place the broccoli florets and sliced red bell peppers on the baking sheet, tossing them with 1 teaspoon of olive oil, a pinch of sea salt, and black pepper.
Roast the vegetables for 15 to 20 minutes until they are tender and show light golden-brown edges.
While vegetables roast, season the chicken breast evenly with garlic powder, dried oregano, and the remaining sea salt.
Heat the remaining 1 teaspoon of olive oil in a non-stick skillet over medium-high heat.
Sear the chicken for approximately 6-7 minutes per side, or until the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest for 5 minutes before slicing into thin strips.
To assemble, place the warm cooked brown rice in a bowl and top with the roasted vegetables and sliced chicken.
Drizzle the entire bowl with fresh lemon juice to brighten the flavors before serving.