In a large skillet, heat the olive oil over medium-high heat. Add the sliced mushrooms to the skillet; saute them until they release liquid and are tender (about 5 minutes).
When the mushrooms are finished cooking, move them to the outer edge of your skillet. Put the chicken breasts into the middle of the skillet; cook chicken breasts until they are golden. This will take about 3 minutes per side.
Add the Marsala wine to the skillet. simmer for 1 minute. Add only 3/4 cup of the beef broth (reserve the other 1/2 cup), and simmer (uncovered) until the chicken breasts are cooked through. this will take 8-9 minutes.
In a separate bowl, dissolve cornstarch into remaining 1/2 cup of beef broth; add this mixture to skillet. Simmer all ingredients until sauce thickens (about 1 minute). Stir constantly and mix mushrooms into the sauce. Remove from heat.
If desired, serve chicken on top of hot cooked rice or egg noodles. Serve the chicken breasts with the mushroom wine sauce spooned over the top. Use all the sauce. (There will be about 1/3 cup of the sauce per chicken breast. Garnish with additional dried thyme, if desired. Serve, and enjoy!
NOTE: Caloric calculation does not include optional rice or egg noodles.
Chicken Marsala https://www.thegratefulgirlcooks.com/chicken-marsala/