Follow these step-by-step instructions to prepare the Creamy Mushroom Chicken Breast Delight:

Preparing the Chicken

1. Season the Chicken: Start by seasoning the chicken breasts with salt and black pepper on both sides.
2. Heat the Olive Oil: In a large skillet over medium-high heat, add olive oil and butter. Allow the butter to melt and mix with the oil.
3. Cook the Chicken: Add the chicken breasts to the skillet. Cook for about 5-7 minutes on each side, or until golden brown and cooked through. Remove the chicken from the skillet and set it aside.

Making the Mushroom Sauce

4. Sauté the Onion and Garlic: In the same skillet, add the chopped onion and minced garlic. Sauté for about 2-3 minutes, or until the onion becomes translucent.
5. Add the Mushrooms: Add the sliced mushrooms to the skillet. Cook for 5-7 minutes until the mushrooms are browned and tender.
6. Create the Roux: Sprinkle the flour over the mushroom mixture. Stir well to combine and cook for another 1-2 minutes.
7. Pour in the Liquids: Gradually add the chicken broth while stirring constantly to avoid lumps. Then, add the heavy cream and continue to stir until the sauce thickens.
8. Season the Sauce: Add fresh thyme, salt, and pepper to taste. You can also add a splash of lemon juice for a hint of acidity, if desired.

Combine and Serve

9. Return the Chicken: Place the cooked chicken breasts back into the skillet, ensuring they are well-coated with the mushroom sauce.
10. Simmer: Reduce the heat to low and let the dish simmer for about 5 minutes, allowing the flavors to meld together.
11. Garnish: Before serving, garnish with freshly chopped parsley.