In small bowl, mix mayonnaise and Italian seasoning; set aside.
Heat 10-inch nonstick skillet over medium-high heat. Add turkey and bell pepper and onion stir-fry; cook and stir 1 minute. Cover; cook 2 minutes.
Meanwhile, spread about 1 tablespoon mayonnaise mixture on cut sides of buns.
Uncover skillet; cook and stir 1 to 3 minutes longer or until liquid evaporates and bell pepper is tender.
Spoon turkey mixture evenly onto bottom halves of buns. Cover with top halves of buns. Wrap each sandwich securely with foil; take with you for an on-the-go dinner.