Season the chicken breasts evenly with salt and pepper.
Heat the olive oil and 1 tablespoon of butter in a large skillet over medium-high heat.
Place the chicken breasts in the hot skillet and sear for 5 to 7 minutes per side until golden brown and cooked through (internal temperature reaches 165°F). Remove the chicken from the skillet and set aside on a plate.
Reduce the heat to medium. Add the remaining 3 tablespoons of butter to the skillet. Once melted, add the minced garlic and cook for about 1 minute until fragrant. Do not let the garlic burn.
Pour in the chicken broth and lemon juice. Scrape up any browned bits from the bottom of the pan using a wooden spoon.
Stir in the Italian seasoning. Let the sauce simmer and reduce slightly for 2 to 3 minutes until it thickens a little.
Return the cooked chicken breasts to the skillet. Spoon the sauce over the chicken.
Garnish with fresh chopped parsley before serving immediately.
Notes
For a complete meal, add 1 cup of fresh spinach or sliced asparagus to the sauce during the last 2 minutes of simmering.
If you prefer a richer sauce, add 2 tablespoons of heavy cream after the broth has reduced.
Use fresh lemon juice for the best flavor in this sauce.