Preheat the oven to 400°F.
Season the chicken breast on both sides with salt, pepper, and half of the chopped mixed herbs.
Heat a non-stick skillet over medium-high heat. Add the chicken breast and sear for about 3-4 minutes on each side until golden brown. Reduce heat to medium-low, cover, and cook until the chicken reaches an internal temperature of 165°F (about 6-8 additional minutes).
Meanwhile, peel and cube the russet potato. Place the potato cubes in a pot, cover with water, add a pinch of salt, and bring to a boil. Simmer until the potatoes are tender (approximately 12-15 minutes).
In a small saucepan, heat the skim milk with the remaining mixed herbs and one crushed garlic clove for extra flavor.
Drain the potatoes and return to the pot. Add the warm herb-infused milk, unsalted butter, and remaining minced garlic. Mash until creamy, seasoning with salt and pepper to taste.
Prepare the asparagus by trimming the tough ends. Toss with olive oil, salt, and pepper, and arrange on a baking sheet. Roast in the preheated oven for about 10 minutes until tender and slightly crispy.
Plate by slicing the chicken breast and serving alongside a generous scoop of garlic mashed potatoes, with roasted asparagus on the side. Enjoy your nutrient-balanced meal.