Pat the chicken breasts dry with paper towels, then season generously with salt and pepper on both sides. Set aside.
Heat the olive oil in a large skillet over medium heat until shimmering and just starting to smoke slightly.
Add the chicken breasts to the pan, laying them flat. Cook for about 6-8 minutes per side, until they develop a golden-brown crust and are cooked through. Use tongs to flip carefully and avoid tearing the meat.
While the chicken is cooking, zest one lemon directly over the pan for a burst of citrus aroma, then juice the lemon and set aside about 2 tablespoons of the juice.
Once the chicken is golden and cooked through (internal temperature of 75°C/165°F), transfer it to a plate and let it rest for about 5 minutes to keep it juicy.
In the same skillet, add the minced garlic and sauté over medium heat until fragrant and golden, about 30 seconds. Be careful not to let it burn.
Pour in the freshly squeezed lemon juice, scraping up any browned bits from the bottom of the pan. Let it simmer for about a minute until slightly reduced and fragrant.
Return the rested chicken to the pan, spooning the lemon-garlic sauce over the top. Warm through for 1-2 minutes, ensuring the chicken is coated with the bright, glossy sauce.
Garnish with chopped parsley or thyme, then serve immediately, spooning extra sauce over the chicken for maximum flavor and visual appeal.