When Jacksonville, Fla.-based Firehouse Subs was looking for a way to add more healthful options to its hot submarine sandwich menu, co-owner Robin Sorensen wasn’t sure it was possible.
“Full flavors and great taste. How do you do that in low-calorie?” he said. “I wasn’t sure how much flavor you can get with fewer calories.”
But Sorensen discovered it could be done — with the right sauce. In February, the fast-casual chain rolled out its under 500-calorie menu, featuri