Celebrity chef Bobby Flay knows his way around a burger, but you might be surprised by the specific way insists on cooking ...

"A medium-rare burger cooked to 135 degrees [Fahrenheit ... to use an electronic meat thermometer. "It is the best investment for a kitchen for accurate readings," she said.

Sarah opted for medium rare burgers when given the choice ... of course — might be the best veggie burger in Chapel Hill. The toasted bun held its own (no soggy bottom here), and the burger ...

A burger topped with caramelized onions and melty cheddar cheese and a basket of fries sit on a table at a restaurant - D3sign/Getty Images ...