No more 'gimme a burger and hold the bun.' Low-carb mania may reach new highs Monday when the Hardee's and Carl's Jr. hamburger chains announce plans to introduce the fast-food world's first 'low-carb burgers.'

The big bunless burgers 'one-third to half a pound' will come wrapped in large leaves of iceberg lettuce for a handhold on the burger and fixings.