Preheat your oven to 400°F (200°C).
In a small bowl, whisk together 0.5 tbsp of olive oil, lemon juice, lemon zest, dried oregano, sea salt, and black pepper.
Place the chicken breast on a parchment-lined baking sheet and brush thoroughly with the lemon-herb marinade.
Roast the chicken for 20 to 25 minutes, or until the internal temperature reaches 165°F.
While the chicken is roasting, heat the remaining 0.5 tbsp of olive oil in a small saucepan over medium heat.
Add the diced onion and minced garlic to the pan, sautéing for 3 to 4 minutes until translucent and fragrant.
Stir in the dry basmati rice and toast for 1 minute, then pour in the chicken bone broth.
Bring the liquid to a boil, then reduce the heat to low, cover, and simmer for 15 minutes.
Remove the rice from the heat and let it sit covered for 5 minutes before fluffing with a fork and stirring in the fresh parsley.
Slice the roasted chicken breast and serve it over the warm rice pilaf.