1
Heat butter and olive oil in a large skillet over medium heat. Add in onions and cook for 10-15 minutes stirring every 5 mins. Add in the marsala and scrape the bottom of the pan to remove any brown bits. Remove from heat.
2
On both sides with Italian seasoning, salt and pepper. You'll want to make sure you season the chicken very well!
3
Add olive oil to the same pan the onions were cooked in. Heat oil over medium high heat and add in chicken breasts. Cook chicken for 4-5 minutes on each side.
4
Remove chicken from pan and Return the onions back to the pan and stir in flour. Cook for one minute stirring constantly so it doesn't burn.Whisk & simmer for 2-3 minutes.
5
Preheat oven broiler to high. Add the chicken back to the pan and top each chicken breast with a slices of cheese. Place in the oven and broil until the cheese has melted.
6
Finally, serve the French onion chicken with fresh parsley, if desired. Serve warm and enjoy!