Fire the flat top up to low- medium heat and lightly add oil if needed. Add on the sausage and pepperoni and let cook for a few minutes until browned and sausage is no longer pink.
When the sausage is almost done, add some butter to the other side of the surface (set to low) and add the Italian bread.
On one slice add the pizza sauce, on the other add some cheese. Let toast and melt for a few minutes.
When everything is cooked to your liking, load the slices of bread with the sausage and pepperoni mixture. Then top with the other slice of bread.
Serve hot and enjoy!