Slice each chicken breast into three cutlets.
Add 1 cup of flour seasoned with salt and pepper to a shallow dish. Lightly flour each chicken breast and set aside. Discard the leftover flour.
Wash and slice your mushrooms.
Finely chop the garlic and shallot.
Add 2 tablespoon of olive oil in a large saute pan over medium heat. When the oil is hot, add your chicken. Brown in batches and set aside.
After the chicken has browned, add 1 tablespoon of olive oil to the pan. Add the chopped garlic and shallot. Sautee for 2-3 minutes. Don't let the garlic burn! Add the mushrooms and let them cook down a bit. After the mushrooms have wilted down, add 1 tablespoon of butter.
Once the butter has melted, sprinkle one tablespoon of flour over the mushrooms and stir gently.
Now add 1/2 cup of Marsala wine. Let that reduce for a minute or two. Then add 1/2 cup of chicken broth to the pan. Taste the sauce and add salt and pepper if needed. Add your chicken back to the pan and cover. Cook everything together until the chicken has cooked through.
Serve over hot pasta!