Prep the Chicken:
Season chicken with salt and pepper on both sides.
Sear Chicken:
In a large skillet, heat olive oil over medium-high heat. Add chicken and sear 5–6 minutes per side, or until golden and cooked through. Remove and set aside.
Make the Sauce Base:
Lower heat to medium. Add butter and garlic to the same pan and sauté for 1 minute until fragrant.
Deglaze and Simmer:
Stir in chicken broth, lemon juice, Dijon mustard, and lemon zest. Simmer for 2–3 minutes, scraping up any browned bits from the bottom.
Add Cream and Chicken:
Stir in heavy cream and bring to a gentle simmer. Return chicken to the pan and spoon sauce over the top. Simmer 3–4 minutes until everything is heated through and sauce thickens slightly.
Serve:
Garnish with fresh parsley and lemon slices. Serve with rice, mashed potatoes, or sautéed green beans.