Preheat your oven to 375°F (190°C).
Rub the turkey breast with olive oil, dried rosemary, dried thyme, salt, and pepper.
Place the turkey in a small baking dish and roast for 25-30 minutes, or until the internal temperature reaches 165°F.
While the turkey is roasting, peel the potato and cut it into 1-inch chunks.
Place potato chunks in a pot of salted water, bring to a boil, and cook for 12-15 minutes until fork-tender.
Drain the potatoes and return them to the pot over low heat for one minute to evaporate excess moisture.
Add the minced garlic and chicken broth to the potatoes.
Mash the potatoes until smooth and creamy, adding a splash more broth if a thinner consistency is desired.
Slice the roasted turkey breast and serve immediately over the warm garlic mashed potatoes.