First of all just let me say McDonald's doesn't really make a Philly
Sandwich (I don't think).
A Philly Cheesesteak Sandwich is essentially beef, peppers and onions which
have been sliced and chopped (not ground beef). This is fried and then
cheese is added near the end so it all melts together. Then it is put on a
There may be many variations but I have only had two sandwiches and they
came from the same place. There are, according to my guidebook, two
restaurants in Philadelphia which claim to be the originators of this
sandwich (hence the Philly).
I have heard it called 'heart attack on a bun'...but it's delicious.