Begin by heating the oven to 200°F and placing an oven-safe plate on the center rack. This will be used to keep the chicken warm later.
Heat 2 tablespoons of cooking fat in a large skillet over medium-high heat. Then, season the chicken with salt and pepper and cook in the skillet for 3 minutes per side, until cooked through. Remove the chicken from the pan and place on the warmed plate and back into the oven to stay warm.
5 boneless skinless chicken breasts, 2 tablespoon cooking fat, Sea salt and freshly ground black pepper
Over low to medium heat on the same skillet, cook 4 slices of diced bacon for about 4 minutes, until crispy. Remove the bacon from the skillet and reserve.
4 slices bacon
Add ½ pound of sliced button mushrooms to the skillet and turn the heat to medium-high. Cook for around 8 minutes, or until the liquid from the mushrooms has evaporated entirely, and the mushrooms have a light brown sear.
½ lb button mushrooms
To the skillet, incorporate the cooked bacon, 1 minced garlic clove, and 1 teaspoon of tomato paste. Cook for about 1 minute.
1 teaspoon tomato paste, 1 garlic clove
Pour in 1 cup of Marsala or red wine into the skillet. Bring up to a boil, then lower heat to simmer until about 1 ¼ cups of liquid remain, which should take about 5 minutes.
1 cup Marsala wine
Take the skillet off the heat and put in 1 ½ tablespoons of lemon juice. Drop 4 tablespoons of butter or ghee one at a time, mixing each time to combine. Include 2 tablespoons of minced fresh parsley.
1 ½ tablespoon lemon juice, 4 tablespoon butter, 2 tablespoon fresh parsley
Begin seasoning the Marsala sauce with 1 teaspoon each of sea salt and freshly ground black pepper. Taste and adjust seasoning as needed. Drench the Marsala sauce over the cooked chicken and serve.