Chicken Marsala

So ever since I posted a picture of my Home made Chicken Marsala people have been asking for the recipe
With all the work I have been doing I have not had the change to put up the recipe:

Well here it is:
1 Onion Thinly Sliced
1 Green Pepper Thinly Sliced
1 Red Pepper Thinly Sliced
3 Cups Mushroom Sliced
3 Chicken Breast Cut in half
3/4 cup Marsala Wine
1 Cup Chicken broth
1/2 tsp oregano
2 tablespoon olive oil
2 tablespoon butter
Salt and pepper to taste

Directions
1.Salt and pepper sliced Chicken breast
2. In a heavy cast iron pan, heat olive oil and butter
3. Place chicken in pan and lightly brown on both sides( do in two batches)
4. Remove chicken and add onions, green and red pepper and cook until soft add Mushroom and continue to cook until mushroom are cooked
5 Add Marsala wine and scrap brown bits from the bottom of pan
6. Let wine cook for 3-4 minutes
7. Add chicken broth and 1 tsp of flour, cook for an additional 3-4 minutes
8. Add chicken back to pan and place in a pre-heated oven for 15 minutes or until chicken is cooked through.
8. Remove from oven and Serve...