Creating Chicken in Butternut Squash Mushroom Cream Sauce can be done with ease if you follow these step-by-step instructions:

1. Warm the Oil: In a large skillet, heat the olive oil over medium heat.
2. Sauté Chicken: Add the sliced chicken to the skillet and season with salt and pepper. Cook until browned on all sides, about 5-7 minutes. Remove the chicken from the skillet and set aside.
3. Cook the Vegetables: In the same skillet, add the onions and garlic. Sauté until they become translucent, about 2-3 minutes.
4. Add Mushrooms: Stir in the sliced mushrooms and cook until they’re tender, approximately 4-5 minutes.
5. Incorporate Squash: Add the cubed butternut squash and thyme to the skillet. Stir well and cook for another 5 minutes.
6. Combine Ingredients: Return the chicken to the skillet and mix with the veggies.
7. Pour in Liquid: Add the chicken broth and heavy cream to the skillet. Bring to a gentle simmer.
8. Season: Stir in the nutmeg (if using), additional salt, and pepper to taste. Allow the sauce to thicken gradually for about 10-15 minutes.
9. Check for Doneness: Make sure the chicken is thoroughly cooked through and the squash is tender.
10. Serve: Plate the dish and garnish with fresh parsley before serving.

By following these simple steps, you will create a beautiful and delicious Chicken in Butternut Squash Mushroom Cream Sauce that will leave everyone asking for seconds!