- Preheat oven to broil on low 
- On stovetop, heat oil in skillet to medium high 
- Saute chicken breasts, peppers onions and mushrooms until vegetables are softened and start to carmelize (3-5 min).  
- Remove veggies and set aside.  
- Flip chicken and cook until internal temp is 160-165.  
- Remove chicken from pan and slice to thick slices.  
- Add chicken and veggies back to pan and add 1/4 cup teriyaki sauce. Stir until sauce is evaporated and all items are heavily coated.  
- Line a cookie sheet with parchment paper and lightly spray with non-stick spray 
- Open sub roll and lay on parchment 
- Top both sides of sub roll with chicken & veggies 
- Top with Swiss cheese  
- Broil for 2-3 minutes until cheese starts to bubble and brown SLIGHTLY. (This time can vary greatly according to your broiler. Start with broiler on low and watch it closely – you just want the cheese to melt.)  
- Remove from oven 
- Fold over subs and serve!