Preheat the oven to 400?.
Arrange the chicken breasts at one end of the pan. They should not be touching as you want them to bake evenly. Salt and pepper them to taste.
Arrange the green beans in the middle of the pan next to the chicken. Pile them on top of each other so that they steam while cooking.
Place the cut potatoes at the end of the pan. Make sure they are in a single layer and not overcrowded.
Mix the olive oil, garlic, and seasoning together in a small bowl. Drizzle the mixture over the chicken, potatoes, and green beans. Toss the vegetables to coat and make sure the tops of the chicken are coated generously.
Bake in the oven for 25-35 minutes. The cook time will vary based on the thickness of your chicken and vegetables.
This chicken and potato meal is done when the chicken reaches an internal temperature of 165? and the potatoes are fork-tender.