CHICAGO - As most college students know, downing cold pizza for breakfast is an old standby. But nowadays, breakfast pies come piping hot with eggs and other breakfast fixings, Nation€™s Restaurant News reports.

In 2009, Technomic€™s MenuMonitor didn€™t see any breakfast pizzas on menus. Fast-forward a year and a dozen morning pies have appeared on breakfast menus.

One of those adding breakfast pizza is an Iowa chain called Happy Joe€™s Pizza & Ice Cream Parlor. "We deliver it [breakfast pizza] to a lot of businesses in the morning," said Kristel Whitty-Ersan, marketing director.

The chain€™s omelet pizza contains cheese, veggies and eggs, but no tomato sauce. Other breakfast pizzas include an all-meat, a vegetarian, a Denver and a Western. "It€™s a little bit of a challenge getting your guests to think of you for breakfast," said Whitty-Ersan. "It definitely takes time and money. But it€™s a lot of fun to add a daypart."

Last fall, Domino€™s Pizza€™s only 24-hour location debuted breakfast pizza. "It€™s doing very well," said assistant manager Steve Martin. "The word€™s getting out there and we€™re getting a lot of customers coming back and ordering more."

Leona€™s Neighborhood Restaurants offers 12 individual-sized breakfast pizzas, such as the Wise Guy, the Popeye and the Queen Mary. At Pulino€™s Bar & Pizzeria, breakfast pizzas take up an entire section of the menu, with Nutella, roasted fruit with cinnamon and pecorino cheese, and eggs, bacon and sausage as popular choices.