Pat the chicken cutlets completely dry with paper towels, then season both sides generously with salt and black pepper. Heat the olive oil in your dark, rustic skillet over medium-high heat. Lay the chicken in the skillet and let it sear undisturbed for 4-5 minutes until a deep, golden-brown crust forms. Flip and cook for 3-4 minutes until cooked through. Remove to a plate and cover loosely.

Lower the heat to medium and melt 1 tbsp of butter in the skillet. Add the sliced mushrooms in a single layer without stirring. Cook for 4-5 minutes to develop a dark crust. Toss gently and cook for 1 more minute.

Add the remaining 1 tbsp of butter and the minced shallots to the skillet. Sauté for 2 minutes until translucent. Stir in the minced garlic and cook for 30 seconds until fragrant.

Pour the dry Marsala wine into the skillet. Use a wooden spoon to scrape the bottom of the skillet, lifting all the browned bits (fond). Let the wine simmer and reduce by half, about 3-4 minutes.

Stir the dry orzo into the skillet, toasting it for 1 minute. Pour in the chicken broth and bring to a gentle simmer. Reduce heat to low, cover the skillet, and cook for 10-12 minutes.

Once the orzo is tender and has absorbed most of the broth, remove the lid. Stir in the heavy cream until the sauce becomes rich, glossy, and velvety. Taste and adjust seasoning with salt and pepper.

Return the golden-brown chicken and any resting juices to the skillet, nestling them into the creamy orzo and mushrooms. Simmer for 2 minutes to warm through. Remove from heat, garnish with chopped parsley, and serve.