In a baking dish, layer the ground beef or turkey, onion, garlic, potatoes, carrots, green beans, cream of mushroom soup, and milk. Season with Italian seasoning, salt, and pepper.
Mix everything gently until well combined. Cover with foil and bake for 30 minutes.
Remove the foil, sprinkle cheese on top, and bake for an additional 15 minutes or until the cheese is melted and bubbly.
Notes
You can customize the vegetables based on your preference. Feel free to add or substitute other vegetables.