1. 1. Preheat the oven to 400°F (200°C).

2. 2. Season the chicken breast with salt and pepper.

3. 3. In a skillet, heat butter over medium heat and sear the chicken until golden brown on both sides, about 5-6 minutes per side.

4. 4. Remove the chicken from the skillet and set aside.

5. 5. In the same skillet, add minced garlic and sauté until fragrant, about 1 minute.

6. 6. Add fingerling potatoes to the skillet and cook until slightly browned, about 5-6 minutes.

7. 7. Place the chicken back into the skillet, pour steak sauce over the chicken, cover with a lid, and transfer to the preheated oven.

8. 8. Roast for 20-25 minutes or until the chicken is cooked through and potatoes are tender.

9. 9. Meanwhile, toss broccoli florets with olive oil, salt, and pepper on a baking sheet.

10. 10. Roast the broccoli in the oven for 15-20 minutes or until tender and slightly charred.

11. 11. Serve the steak sauce chicken with garlic potatoes and roasted broccoli florets on a plate.

12. 12. Garnish with chopped fresh parsley before serving.