Preheat oven to 400 °F (200 °C). Season chicken breasts generously with salt and pepper.

In a large oven-safe skillet, heat olive oil and 2 Tbsp butter over medium-high heat. Add chicken and sear 3–4 min per side until golden. Transfer chicken to a plate.

Reduce heat to medium, add garlic and cook 30 seconds until fragrant.

Stir in lemon juice, lemon zest, oregano, and chicken broth. Bring to a simmer, scraping up browned bits.

Whisk in the remaining 2 Tbsp butter until melted and sauce thickens slightly.

Return chicken to skillet, spoon sauce over each breast.

Transfer skillet to oven and bake 15–18 min, or until chicken reaches 165 °F internally.

Remove from oven, let rest 5 minutes in sauce.

Garnish with fresh parsley and an extra squeeze of lemon before serving.