Rob are a local Philadelphia treasure, and insiders know this place to be synonymous with the plate.

This is Tommy du Knicks, and it's been making the city's iconic roast pork sandwich since 1977.

I tell people all the time that this is the real Philadelphia sandwich steak sandwiches.

They're fine, but a roast pork with broccoli rob That's a Philadelphia sandwich, for sure.

We're in Reading Terminal Market in Philadelphia today.

It's one of the country's oldest public markets, and we're heading straight to the Knicks to try their famous roast pork sandwich.

Everybody knows Philly loves cheese steaks, so we want to know.

Why do locals say the roast pork is the rial sandwich of Philadelphia?

We'll find out.

Thematic at the Knicks begins at 4 a.m. When Joe and his team start butchering meat and tying it up, they had a generous helping of salt and a dry rub of Italian herbs and spices, using their hands to coat and season the whole ham.

Every week, £3500 of pork had in and out of the oven at five hour increments.

Then comes the build crumbled sharp provolone wedged into a fresh baked Philly role layered with thin sliced roast pork and broccoli.

Rob broccoli Robin pork has been a longstanding combination in certain regions in Italy, so it was a natural match.

It's gonna be a hard one to I just know it.

Yeah, it is so juicy.

Honestly, this pork is so rich in flavor.

They salted it.

They added pepper.

They had a rosemary.

Just there's like an assortment of spices, and you just get that path of flavor in every single bite.

The broccoli rob is great.

I don't know if I honestly need it, because I really just love the pork and provolone combination butt hole.

I can't see that flavor, just like on my tongue.

It's just good.

It's just really good.

The roast pork sandwich is as old as the cheesesteak, though far less famous to non Philly natives.

And while it's found on menus at restaurants throughout the city, Tommy Tunics is known for specializing in it.

Everybody is all about the Philly cheese steak, but my money is on the roast pork from the Knicks is the best sandwich in Philadelphia.

The shop focuses almost entirely on roast pork and beef, and that's exactly why publications praise it and people seek it out.

In 2012 the Travel Channel recognized the Knicks roast pork sandwich as the best sandwich in America.

I told all my friends the Knicks was always the best roast pork sandwiches you ever ate in a very friendly area, but crowded.

So they're gonna come.

They have to be patient, but everybody takes care of you, and it's awesome.

Joe Nicolosi is the fourth generation owner of Tommy Tunics.

He, like his father, grew up making roast pork.

My dad became a place for locals for people that worked in the area that came here for lunch.

It's kind of like 30 years of doing something in the right way in one spot, and people slowly and surely start to catch on.

What you're doing is not that thing where we would say like, Oh, this is a family recipe and this is how we do it and this is top secret.

Not really our thing.

It's more like, Can we make it better?

I grew up watching my dad try to do that, and I'm doing the same thing.

Joe isn't so interested in whether people prefer cheesesteak or roast pork or whatever sandwich Philly is famous for.

He just hopes you like what he's got.

There's lots of good things to eat in here, and I, uh I'm not a particularly good salesman.

Necessarily cook.

I'm here at four in the morning every day, and I do the vast majority of cooking myself.

So I do the best that I can with my cooking, and if you like it, that's that's great.

It's so much fun to come somewhere where you can be assured that the product's gonna be awesome.

And then when you bring somebody like Ed from out of town who's a real food guy to boom and you get this flavor explosion and then he pats me on the back and thinks, I'm amazing.

It's awesome.

So it's win, win, win.