Preheat your oven to 400°F and line a small baking sheet with parchment paper.
Season the chicken breast evenly with the sea salt, black pepper, and dried oregano.
Place the chicken on the prepared tray, drizzle with 1 teaspoon of olive oil, and roast for 20-25 minutes until the internal temperature reaches 165°F.
While the chicken is roasting, heat the remaining 1 teaspoon of olive oil in a small saucepan over medium heat.
Add the finely diced yellow onion and minced garlic to the pan, sautéing for 3 minutes until translucent and aromatic.
Stir in the dry basmati rice and toast for 1 minute, then pour in the chicken broth and bring the mixture to a boil.
Reduce the heat to low, cover the saucepan with a tight-fitting lid, and simmer for 15 minutes until all liquid is absorbed.
Remove the rice from the heat and let it rest, covered, for 5 minutes before fluffing with a fork.
Fold the lemon juice, lemon zest, and chopped fresh parsley into the rice pilaf.
Slice the roasted chicken breast into thin strips and serve immediately over the warm, citrusy rice.