01 -
Preheat oven to 350°F.
02 -
Brown ground beef in large pot over medium-high heat. Season with salt, pepper, and Italian seasoning. Drain grease, transfer to plate, and cover with foil.
03 -
Melt 2 tablespoons butter in same pot. Add onions and cook 5 minutes until softened. Add garlic and cook 1 more minute.
04 -
Add beef broth, remaining butter, and rice. Bring to boil, reduce to simmer. Cover tightly and cook 10 minutes. Add mushrooms, replace cover, and cook 5-10 more minutes without stirring.
05 -
Turn heat off, leave cover on, and let stand 10 minutes without stirring.
06 -
Add cooked beef, cream of mushroom soup, milk, sour cream, and half the cheese. Stir to combine.
07 -
Transfer to greased 9x13 casserole dish. Top with remaining cheese. Cover and bake for 20 minutes.