01 -
Heat butter in a big pan over medium heat. Cook the ground beef until it's nicely browned, then pour off any extra fat.
02 -
Mix in the salt, pepper, garlic powder, and onion powder with the browned beef and stir well.
03 -
Take a large bowl and mix together the cooked rice, beef, sour cream, and condensed French onion soup until everything is well blended.
04 -
Set the oven to 350 degrees Fahrenheit. Lightly grease a 9x13 inch casserole dish so nothing sticks.
05 -
Put the mixture into the greased dish, sprinkle mozzarella cheese on top, and bake for 30 to 45 minutes until it’s bubbly and has a golden crust.