In a large saucepan, bring broth to a boil. Stir in rice; cover and remove from the heat. Let stand for 5 minutes. Stir in 2 tablespoons butter; set aside.
Meanwhile, in a large skillet, cook beef and sausage over medium heat until no longer pink; drain. Transfer to a large bowl. In the same skillet, saut� mushrooms and garlic in remaining butter until tender; add to meat mixture. Stir in the spinach, cottage cheese, eggs, soup mixes, garlic powder, Creole seasoning and reserved rice mixture.
Place mixture in a greased 13" x 9" baking dish and sprinkle with Parmesan cheese. Cover and bake at 350�F for 45 minutes. Uncover; bake 10 to 15 minutes longer or until heated through.