The next time you order in, the delivery guy should be wearing a FedEx or UPS uniform. With just one day's notice, you can sample some of the country's best regional foods. All you have to do is heat and eat. After you devour buttery, handmade biscuits from Charleston, real-deal étouffée from Cajun country, and life-changing mac and cheese from Seattle, you might as well toss that stack of takeout menus—because it's going to be impossible to go back to those California rolls from down the street.

Sausage Pizza
LOU MALNATI'S, CHICAGO
Pizza and delivery go hand-in-glove, but this sure isn't Domino's. The deep-dish variation known as Chicago-style was perfected at Lou Malnati's (which has been making premier pies since 1971), and the appeal is threefold: the house-made sausage, the glorious crust (thin on the bottom, high on the sides), and the inspired inversion of sauce and mozzarella. $39.95 each, shipping included; loumalnatis.com

Crab Cakes
J.W. FAIDLEY, BALTIMORE
Of the several Maryland seafood shops that overnight this regional delight, J.W. Faidley takes the cake. Its inch-and-a-half-thick mounds are composed almost entirely of Chesapeake Bay jumbo lump crabmeat, and once you broil them for five minutes, you'll understand why patrons fight for seats at the store's old-fashioned lunch counter. $12.95 each, plus shipping; faidleyscrabcakes.com

Country Ham Biscuits
CALLIE'S CHARLESTON BISCUITS, CHARLESTON
Deep in biscuit country, Callie White shuns machines, making every batch of these cream-cheese-spiked pastry pillows by hand. Embrace the pork-improves-everything theory, and order the version stuffed with country ham and mustardy butter. Since they require only half an hour in the oven, there's no excuse for eating them any way besides piping hot. $45.90 for two dozen, plus shipping; calliesbiscuits.com

The Original Sloppy Joe
TOWN HALL DELI, SOUTH ORANGE, NEW JERSEY
Forget the mystery-meat sandwich from your middle-school cafeteria—as everyone in New Jersey knows, that's not a real sloppy joe. The genuine article was invented at this family-owned deli—a triple-decker monster on rye with layers of coleslaw, Russian dressing, turkey, and roast beef. Even the mayo is made in house. No wonder they ship so many to displaced Jerseyites and food freaks alike. $15.99 each, plus shipping; townhalldeli.com

Gaspe Nova, Bagels, and Cream Cheese
RUSS & DAUGHTERS, NEW YORK CITY
For those who think a New York breakfast of bagels and lox can be a religious experience, this Lower East Side institution is a high church—or rather, synagogue. If you can't ogle the cases in person, you can order the favorite of fish-with-coffee die-hards: Gaspe Nova (cured, cold-smoked Atlantic salmon) with hand-rolled bagels and a tub of prototypical cream cheese. Nova, $32 a pound; bagels, $9.60 a dozen; cream cheese, $8 a pound; plus shipping; russanddaughters.com