A bowl of chili can be like a campfire in your belly. It drives away the cold for hours. And in a place like Grand Forks, North Dakota, where 30 degrees below zero--not counting wind chill--isn't big news, it's essential to keep internal embers burning.That might be why the Peartree Restaurant, a longtime eatery at the Clarion Inn, has kept its famous white chili on the menu for more than a decade. Chef Rob Barron's brew replaces the standard beef and red beans with chicken and white beans. The chili has a creaminess few others match. Serve it in bread bowls topped with sour cream like the restaurant does, and it's as decadent as it is hearty.