Preheat oven to 400°F. Lightly grease a baking sheet pan with cooking oil spray. Place chicken onto sheet pan, making sure not to overlap any of the chicken pieces.

In a small bowl, combine garlic, butter, broth and herbs. Stir until evenly mixed.

Pour half of the garlic butter mixture over chicken. Place sheet pan into the oven and cook for about 15 minutes.

Flip chicken over and add green beans. Pour remaining garlic butter sauce over green beans. Then spoon some of the the garlic butter sauce that is pooling inside the sheet pan over chicken and green beans so that everything is covered in some garlic butter sauce.

Cook for an additional 10 minutes or until chicken is done and beans are almost cooked. Flip chicken back over. Switch oven to low broil setting and cook for approximately 5 more minutes, allowing the surface of the chicken to crisp and brown slightly and letting the beans finish cooking.

Remove sheet pan from oven. Some of the garlic butter sauce should have browned onto the sheet pan. Use a basting brush to mix any remaining liquid with the browned areas to create a uniform brown sauce. (If you have no more liquid in your sheet pan you can add about 2 tbsp of chicken broth to the browned parts.) Brush the tops of the chicken breasts with the sauce. Garnish with additional herbs if desired. Serve warm.