Place the chicken breasts between two sheets of parchment and pound them to an even ¾-inch thickness. This helps them cook evenly and fast.
Rub the chicken with 1 tbsp olive oil. Season both sides with salt, pepper, thyme, and parsley.
Squeeze the lemon juice over the chicken and let it rest for 5 minutes while the pan heats.
Heat the remaining 1 tbsp oil in a large skillet over medium-high heat.
Add the chicken and the lemon slices. Sear for 4–5 minutes per side, until golden brown and the internal temperature reaches 165°F (74°C).
Rest the chicken for 3 minutes, then spoon the pan juices over the top.
Serve with a quick side salad or steamed rice.