
In a shallow dish, whisk the olive oil, lemon zest, lemon juice, garlic, Dijon mustard, oregano, thyme, salt, and pepper.
Add the chicken on top of the marinade and turn to coat. Cover and marinate in the refrigerator for at least 30 minutes or up to 1 day.
Heat a large heavy-bottom skillet or cast-iron skillet over medium-high heat.
Carefully remove the chicken breasts from the marinade and place them presentation side down, into the hot skillet, making sure not to overcrowd them.
Sear the chicken breasts for 5 minutes without touching until they develop a golden brown crust. Flip the chicken to the other side and continue to cook until they reach an internal temperature of 165°F, 8–10 more minutes.
Remove the chicken from the pan and let them rest for a few minutes before slicing or serving. Serve with a squeeze of fresh lemon juice over the top, fresh parsley, and your desired side dishes.