Add Oil To A Large Non-Stick Skillet. Saute Onions And 2 Tablespoons Of Teriyaki Sauce Until The Onions Are Soft. Add The Sliced Meat And Cook Until Meat Browns Slightly, Add Remaining 1 Tablespoon Of Teriyaki Sauce And Stir To Combine. Place Cheese On The Meat And Stir Until Melted, Mixing Meat, Onions And Cheese Together. Scoop Meat Mixture Onto Sandwich Rolls.