1Heat gas or charcoal grill. In small bowl, toss tomatoes and basil; cover and refrigerate.
2In medium bowl, mix ground beef and Italian seasoning. Shape into 8 equal patties.
3Place patties in grill basket; place on grill over medium heat. Cover grill; cook 8 to 10 minutes, turning once, until meat thermometer inserted in center of patties reads 160ºF.
4Place patties on bottom halves of buns. Top each with slice of cheese and spoonful of tomato mixture. Cover with top halves of buns.