Season the chicken breast evenly with sea salt, black pepper, and dried oregano.
Select the Sauté function on the Instant Pot and add the olive oil to the inner pot.
Sear the chicken for 2 minutes on each side until a golden crust forms, then remove and set aside.
Add the minced garlic to the pot and sauté for 30 seconds until fragrant.
Pour in the chicken bone broth and lemon juice, using a wooden spoon to scrape up any browned bits from the bottom of the pot.
Return the chicken to the pot and sprinkle the lemon zest over the top.
Close the lid, set the valve to Sealing, and cook on High Pressure for 8 minutes.
While the chicken cooks, steam the green beans and ensure your quinoa is cooked and ready for serving.
Allow a 5-minute natural pressure release, then carefully turn the valve to Quick Release.
Slice the chicken and serve it over the fluffy quinoa with the steamed green beans on the side.