Thanks to this season's presenting sponsor, Collar, they design innovative sinks and faucets for people who do their best work in the kitchen.

The following episode of Proof is rated B for beef and contains extreme amounts of gravy.

Listener discretion is advised.

I can't stop thinking about a sandwich.

It's not just me, it's America.

For the past year, we've been transfixed by a simple sandwich of meat and bread.

And it happens to be the most famous sandwich from my hometown, Chicago, the Italian beef.

Italian beefs are a wet, slick, spicy meat mound of a sandwich that's been a hallmark of Chicago dining for nearly a century.

And everyone is talking about it.

Love, love, love, beef sales are booming nationwide as diners crave a taste of Chicago.

Sales of Italian beef have nearly doubled.

Are you seeing that reflected in your sales at all?

We are, actually.

Italian beef sales are said to be up nationwide.

How did the humble Italian beef become the busiest sandwich of the last year?

It's because of a TV show.

It's called The Bear.

Ibra, make sandwiches.

Don't stop making f*** sandwiches.

I'm going to make three sections, okay?

They're going to be wet, hot, and sweet.

All right, I'm going to take green tape, make those sections, Louis.

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