Place the chicken breast between two sheets of parchment paper and pound to a uniform 1/2-inch thickness, then season both sides with sea salt and black pepper.
Heat a large skillet over medium-high heat with the extra virgin olive oil until shimmering.
Place the chicken in the skillet and sear for 4-5 minutes per side until golden brown and cooked through, then remove to a plate to rest.
While chicken cooks, steam the green beans in a steamer basket for 5 minutes until crisp-tender and vibrant green.
In the same skillet used for the chicken, reduce heat to medium and add the ghee and minced garlic, sautéing for 30 seconds until fragrant.
Stir in the lemon juice, lemon zest, and fresh parsley, scraping up any browned bits from the bottom of the pan to create a light sauce.
Return the chicken to the pan briefly to coat in the sauce, then serve immediately alongside the steamed green beans.