Preheat broiler. In a large skillet, heat 1 tablespoon butter over medium heat; saute apple with sugar and cinnamon until crisp-tender, 3-4 minutes. Remove from pan., In same pan, melt remaining butter over medium heat; saute onion until lightly browned, 3-4 minutes. Remove from heat; stir in sauteed apple., Spread cranberry sauce onto cut side of bottom portion of rolls; layer with turkey, apple mixture and cheese. Place on a baking sheet alongside roll tops, cut side up., Broil 3-4 in. from heat until cheese begins to melt and roll tops are golden brown, 45-60 seconds. Add arugula; close sandwiches.