Preheat oven to 400 degrees. Lightly spray a large casserole dish with nonstick cooking spray. Set aside.
Brown ground beef over medium heat in a large skillet. Drain all but 1 Tablespoon of the grease.
1 pound ground beef
Add onion, carrots, and minced garlic. Sauté for 3-5 minutes. Stir in Italian seasoning and cook for one minute or until fragrant. Stir in stewed tomatoes, tomato paste and beef broth. Bring a boil and then reduce to simmer. Simmer for 5-10 minutes. Stir in mushrooms and cook for an additional 1-2 minutes.
1 onion, 2 carrots, 2 cloves garlic, 1 Tablespoon Italian seasoning, 28 ounce can stewed tomatoes, 2 teaspoon tomato paste, 1/4 cup beef broth, 1/2 cup sliced mushrooms
In a bowl, combine the mashed potatoes, garlic powder, and 1/2 cup of Parmesan cheese. Stir well.
2 cups mashed potatoes, 1 Tablespoon garlic powder, 3/4 cup grated Parmesan cheese
Transfer meat and vegetable mixture to the prepared baking dish. Spread mashed potatoes on top. Sprinkle with remaining Parmesan cheese. Cover and bake in preheated oven for 15 minutes. Remove foil and cook for an additional 5-10 minutes or until potatoes are lightly browned and the dish is heated through.