Step 1: Preheat and Prep

Preheat your oven to 350°F (175°C). Lightly grease a 9×13-inch casserole dish.

Step 2: Brown the Ground Beef

In a large skillet or pot over medium-high heat:

• Brown the ground beef, breaking it up as it cooks

• Season with Italian seasoning, salt, and pepper

• Drain excess grease and set the cooked beef aside

Step 3: Cook Aromatics and Rice

• In the same pot, melt 2 tablespoons of butter

• Sauté diced onions for about 5 minutes until soft

• Add garlic and cook for another minute

• Stir in beef broth, remaining 1 Tbsp butter, and uncooked rice

• Bring to a boil, then reduce heat to low, cover, and simmer for 10 minutes

Step 4: Add Mushrooms and Simmer

• Place the sliced mushrooms on top of the rice mixture (do not stir)

• Cover and cook for another 5–10 minutes until the rice is tender

• Remove from heat and let stand, covered, for 10 minutes

Step 5: Mix the Filling

• Add the cooked beef, cream of mushroom soup, milk, sour cream, and 1 cup of shredded cheddar cheese

• Mix everything until well combined

Step 6: Assemble and Bake

• Pour the mixture into the prepared casserole dish

• Sprinkle the remaining 1 cup of cheddar cheese over the top

• Cover with foil and bake for 20 minutes, until hot and bubbly

• Optional: Broil uncovered for 2–3 minutes for a golden cheese crust