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Butter the bread like you would to make a normal grilled cheese.
Put a piece of cheese on the butter side down piece of bread.
Put a generous amount of spaghetti sauce on the piece of cheese.
Add what ever pizza toppings you like-remember, you have to flip this so too many toppings will make this difficult.
Add another piece of cheese on top of the toppings.
Butter the other piece of bread and put it butter side up on top.
Cook until golden brown on each side. Enjoy!