Cut each chicken breast in half lengthwise. Season both sides of each chicken with salt and pepper.
In a large skillet heat olive oil over medium heat. Cook the chicken for 3-4 minutes on each side or until golden brown and cooked through. Remove from the pan and set aside.
Melt 2 tablespoons of butter, add crushed garlic and cook over low heat for 2 minutes. Add chicken broth, lemon juice and bring to a simmer. Add heavy cream, lemon zest, salt to taste and pepper to taste.
Return the chicken the skillet and cook until the sauce has thickened.