Preheat the oven to 400°F (200°C).

In a mixing bowl, combine ground beef, breadcrumbs, egg, garlic powder, onion powder, salt, pepper, Parmesan cheese, and parsley. Mix until well combined.

Shape the mixture into meatballs, about 1 inch in diameter, and place them on a baking sheet.

Bake in the preheated oven for 20-25 minutes, or until cooked through.

While the meatballs are baking, peel and chop the potatoes into even chunks.

Place the potatoes in a pot and cover with cold water. Bring to a boil and cook until tender, about 15-20 minutes.

Drain the potatoes and return them to the pot. Add milk, butter, salt, and pepper. Mash until smooth and creamy.

In a skillet, melt butter over medium heat. Whisk in flour and cook for 1-2 minutes until golden.

Gradually whisk in beef broth, stirring constantly until the gravy thickens. Season with salt and pepper.

Plate the mashed potatoes, top with meatballs, and drizzle with gravy. Serve hot.