Preheat your oven to 400°F.
Season the chicken breast with salt, pepper, and mixed dried herbs. Place it on a baking tray.
Roast the chicken in the oven for 20-25 minutes until cooked through and lightly browned.
Meanwhile, peel and dice the russet potato into even chunks. Boil in lightly salted water until tender, about 10-12 minutes.
In a small saucepan, melt the butter and add minced garlic until fragrant, about 1 minute.
Once potatoes are tender, drain and return them to the pot. Mash with butter garlic mixture and nonfat milk until smooth. Season with additional salt and pepper as desired.
Toss the fresh green beans with olive oil, salt, and pepper, then spread them on a separate baking sheet.
Roast the green beans in the oven for 10-12 minutes until crisp-tender and lightly charred.
Plate the herb-roasted chicken alongside a serving of creamy garlic mashed potatoes and crispy roasted green beans. Enjoy while warm.