Place beef and juices in a medium saucepan; break up any large pieces. Add stir-fry vegetables, 1/2 teaspoon Italian seasoning and the crushed red pepper. Heat through just to boiling.
Meanwhile, for slaw, in a medium bowl, combine coleslaw mix, pepperoncini peppers and liquid, and 1/2 teaspoon Italian seasoning.
To serve, spoon meat mixture on roll bottoms. Top with coleslaw mixture; add roll tops.