"Betcha didn't know this" post-du-jour

I sure didn't. But I now know the following about a certain item that most of us are familiar with.

• In the US, Hawaii is tops in sales of this product, Ohio is second.
• Twenty-three percent of all sales of the product are made during Lent.
• It was invented to attract Catholics, but it's popular among Jews and Muslims also.

Figured it out yet? Give up?

It's this bit of fast food.