One of the most sizzling restaurant stocks around doesn't belong to some upstart better burger chain. And it certainly doesn't belong to struggling better burrito joint Chipotle (CMG) . Instead it's Wendy's (WEN) , the fast-food chain known for its square burgers, loaded baked potatoes and iced cold Frosty desserts that was founded in 1969 by iconic businessman Dave Thomas. Wendy's stock has surged 23% in the past month alone, as it it's fresh off posting a remarkable 15th straight quarter of same-store sales gains in North America on the back of clever value promotions and new limited-time sandwiches. Also helping Wendy's stock: activist investor and Wendy's chairman Nelson Peltz recently upping his stake in the company -- through his firm Trian Partners -- to 23% from 15% in October. TheStreet's Brian Sozzi sat down with Wendy's President and CEO Todd Penegor to discuss how the company is managing to sidestep the mild U.S. restaurant recession, and what Peltz may be seeing in the business.