Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Season the chicken breast evenly on both sides with the sea salt, black pepper, garlic powder, and dried oregano.
Place the seasoned chicken on the baking sheet, drizzle with the extra virgin olive oil, and roast for 20-25 minutes until the internal temperature reaches 165°F.
While the chicken is roasting, combine the dry brown rice, chicken broth, and water in a small saucepan over high heat.
Bring the rice mixture to a boil, then reduce the heat to low, cover with a tight-fitting lid, and simmer for 40-45 minutes until the liquid is fully absorbed.
During the last 5 minutes of the rice cooking, steam the broccoli florets in a steamer basket until they are bright green and tender-crisp.
Once the chicken has finished roasting, let it rest for 5 minutes before slicing it into strips.
Fluff the seasoned rice with a fork and serve it in a bowl topped with the sliced chicken and a side of steamed broccoli.