Preheat your oven to 425°F. Line a baking sheet with parchment paper.
Pat the chicken breast dry. Lightly brush with olive oil and season with salt, pepper, and a pinch of garlic powder. Place it on the baking sheet.
Cut the broccoli into florets, toss lightly with a drizzle of olive oil and a little salt, and spread on another baking sheet.
Bake the chicken breast for about 20-25 minutes until cooked through and the exterior is slightly crispy. Roast the broccoli for 15-20 minutes until tender and lightly charred.
Meanwhile, peel and cube the russet potato and boil in lightly salted water until tender, about 15 minutes. Drain well.
In a small saucepan, warm the garlic cloves in a tiny bit of water or olive oil to soften them, then mash them into a paste.
Mash the boiled potatoes with the garlic paste, add the skim milk gradually to achieve a creamy consistency, and season with salt and pepper to taste.
Plate the crispy baked chicken breast alongside a generous serving of creamy garlic mashed potatoes and roasted broccoli. Enjoy your balanced, delicious meal!