Prep the chicken: Pat the chicken dry with paper towels. Season both sides with salt, pepper, and oregano.
Heat the skillet: Warm the olive oil over medium-high heat in a large skillet.
When the oil shimmers, add the chicken in a single layer.
Sear the chicken: Cook for 4–5 minutes per side, or until golden and just cooked through. Internal temperature should reach 165°F (74°C). Transfer to a plate and tent loosely with foil.
Sauté the garlic: Reduce heat to medium.
Add the butter (if using). Stir in the minced garlic and cook for 30 seconds, just until fragrant. Don’t let it brown.
Build the sauce: Add lemon zest, lemon juice, chicken broth, Dijon, and honey.
Whisk and scrape up any browned bits from the pan. Simmer for 2–3 minutes to reduce slightly.
Return the chicken: Add the chicken and any juices back to the skillet. Spoon the sauce over the top and simmer for 2 more minutes to meld flavors.
Finish and serve: Taste and adjust seasoning.
Sprinkle with parsley and add lemon slices if you like. Serve hot with your favorite sides.