Fresh parsley, minced, for garnish
1 sprig Fresh thyme, optional
2/3 cup Beef stock
2/3 cup Dry marsala wine
2 cloves Garlic, minced
2 tbsp. Shallots, minced
8 oz. Cremini mushrooms, sliced
8 oz. White button mushrooms, sliced
3 tbsp. Unsalted butter, divided
5 tbsp. Olive oil, divided
1/2 cup All-purpose flour
1/4 tsp. Black pepper
1/2 tsp. Kosher salt
4 Chicken breasts