Heat one tablespoon of the 2 tablespoons olive oil in a pan over medium-high heat.
Add the 1.5 pounds chicken breasts to the skillet and cook until each side is golden-brown, about 5 minutes per side. Once done, remove from heat and set aside, covered to keep warm.
Heat the remaining one tablespoon of oil, add the 8 ounces button mushrooms (sliced), and cook until slightly golden brown. Then add the 3 garlic cloves (minced), and sauté until fragrant.
Meanwhile, in a small bowl, whisk the 1/2 teaspoon cornstarch with 2 tbsp of water until fully dissolved. Pour the 1 1/4 cup chicken broth and cornstarch mixture into the pan.
Season with 1/2 teaspoon salt, 1/4 teaspoon pepper, and cook until the liquid starts to bubble. Stir in the 4 ounces Light cream cheese and whisk well until the sauce is smooth and thickened.
Return the chicken breast back into the pan, and spoon over with the hot sauce.
Garnish with 1 tablespoon fresh chopped curly parsley and serve warm.