Pat the chicken breast dry with paper towels and season both sides evenly with sea salt and black pepper.
Heat the extra virgin olive oil in a large stainless steel or cast iron skillet over medium-high heat.
Place the chicken in the skillet and sear for 5 to 6 minutes per side until a golden crust forms and the internal temperature reaches 165 degrees Fahrenheit.
Remove the chicken from the pan and set it aside on a plate to rest.
In the same skillet, add the ghee and the sliced cremini mushrooms, stirring to coat them in the pan juices.
Sauté the mushrooms for 5 to 7 minutes until they have released their moisture and developed a deep brown color.
Add the minced garlic cloves and fresh thyme to the mushrooms, cooking for just 60 seconds until the garlic is fragrant but not burnt.
Pour in the lemon juice to deglaze the pan, using a wooden spoon to scrape up any flavorful browned bits from the bottom.
Slice the rested chicken breast into strips and serve immediately topped with the warm garlic butter mushrooms.