Preheat your oven to 375°F (190°C). This step ensures that your Hobo Casserole bakes evenly.

Thinly slice the medium potatoes into ¼-inch thick rounds and set aside.

In a large skillet, heat a splash of olive oil over medium heat. Add the chopped onion and minced garlic, sautéing for about 3-4 minutes.

Add the ground beef to the skillet, cooking for 5-7 minutes, breaking apart until browned. Season with Italian seasoning, salt, and pepper.

Grease a baking dish and layer half of the sliced potatoes, half of the beef mixture, and half of the cheddar cheese. Repeat layering.

Pour beef broth and optional milk over the layers. Cover the dish tightly with aluminum foil.

Bake in the preheated oven for 35-40 minutes until potatoes are fork-tender.

Remove foil and sprinkle with grated Parmesan cheese. Return to the oven for an additional 10 minutes.

Let the casserole rest for 5 minutes before garnishing with parsley.