Creating Hobo Casserole with Ground Beef & Potatoes is straightforward when you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) to prepare for baking.
2. Brown the Beef: In a large skillet over medium heat, brown the ground beef. Drain any excess fat.
3. Sauté the Onions: Add the chopped onion to the skillet and cook until softened, about 3-5 minutes.
4. Combine Ingredients: Stir in the diced potatoes, frozen mixed vegetables, cream of mushroom soup, and milk. Season with garlic powder, onion powder, salt, and pepper. Mix well until everything is evenly coated.
5. Transfer to Casserole Dish: Pour the mixture into a greased 9×13-inch casserole dish. Spread it evenly and press it down gently.
6. Bake: Cover with aluminum foil and bake in the preheated oven for about 30 minutes. Remove the foil, add the shredded cheese if using, and bake for an additional 15-20 minutes, or until the potatoes are tender.
7. Garnish and Serve: Remove from the oven, let it cool slightly, and garnish with fresh parsley before serving.

Following these steps will help you create a wonderfully delicious Hobo Casserole with Ground Beef & Potatoes that is bound to be a hit!