Pound the chicken breasts to an even thickness of about 1.5 cm (½ inch) using a meat mallet or rolling pin; this helps them cook uniformly.
Mix salt, black pepper, and smoked paprika, then generously season both sides of each chicken breast, pressing the spices into the meat.
Heat a cast iron skillet over medium-high heat and add a tablespoon of olive oil; wait until the oil shimmers and begins to smoke slightly.
Carefully place the chicken breasts in the hot pan, laying them away from you to avoid splatters. Let them cook undisturbed for about 5-6 minutes, until they develop a deep golden brown crust.
Flip the chicken breasts using tongs and cook for another 5 minutes, or until the internal temperature reaches 75°C (165°F); the sides should be juicy and the outside beautifully browned.
Remove the skillet from heat and transfer the chicken to a cutting board. Let it rest for 5 minutes, allowing the juices to redistribute and keep the meat moist.
Squeeze fresh lemon juice over the rested chicken and sprinkle with chopped herbs for a bright, fresh finish.
Slice the chicken breasts against the grain, revealing a juicy, tender interior with a crisp, flavorful exterior.
Serve immediately, accompanied by your favorite sides like salad, rice, or roasted vegetables.