If youve had salisbury steak before, youll know its a delicious meal thats perfect for any weeknight dinner. The steaks are made of ground beef, then typically served with a tasty brown gravy along with any other sides youd like to serve it with, but we found a way to make it even better. Turning it into a casserole is a way to simplify and streamline the whole process, while still getting a delicious meal that will warm everyone up and fill those hungry tummies.