Preheat the oven to 425°F.
Wash and cube the half medium sweet potato into uniform pieces. Toss with half of the olive oil, salt, and pepper.
Place the sweet potatoes on a baking sheet and roast in the oven for about 20-25 minutes until tender and slightly caramelized.
Meanwhile, trim the ends of the green beans. Toss them with the remaining olive oil, salt, and pepper, and set aside.
Season the 5 oz chicken breast with salt, pepper, and any preferred herbs or spices.
Heat a skillet over medium-high heat. Once hot, add the chicken and sear each side for 3-4 minutes until golden brown.
Lower the heat, cover, and cook the chicken breast for an additional 5 minutes until cooked through.
In the last 10 minutes of the sweet potatoes' roasting time, add the green beans to the baking sheet to roast alongside until they are crisp-tender.
Plate the seared chicken breast with a serving of roasted sweet potatoes and green beans. Serve immediately.