In a skillet, cook the ground beef over medium heat until browned. Drain any excess fat.
In a large bowl, combine the cooked ground beef, frozen Potatoes O'Brien, shredded cheddar cheese, cream of mushroom soup, sour cream, salt, and black pepper. Mix well.
Transfer the mixture to a baking dish and spread it out evenly.
Bake in the preheated oven for 45 minutes, or until the top is golden brown and the casserole is heated through.
Let it cool for a few minutes before serving. Enjoy!
Notes:
This casserole is perfect for a family dinner or potluck. Feel free to add more veggies or spices to suit your taste.