Creating Mouthwatering Black Pepper Chicken and Mushroom Skillet is straightforward if you follow these simple steps:

1. Prepare Ingredients: Slice the chicken breasts, mushrooms, and onion, and mince the garlic.
2. Heat the Skillet: In a large skillet, heat the olive oil over medium-high heat.
3. Cook the Chicken: Add the sliced chicken to the skillet. Season with salt and half of the black pepper. Cook for about 5-7 minutes until browned and cooked through. Remove the chicken from the skillet and set aside.
4. Sauté the Vegetables: In the same skillet, add the butter. Once melted, add the sliced onions and mushrooms. Sauté for 4-5 minutes until softened.
5. Add Garlic: Stir in the minced garlic and cook for an additional minute until fragrant.
6. Combine and Season: Return the cooked chicken to the skillet. Add soy sauce and the remaining black pepper. Toss to combine and heat through for another 2-3 minutes.
7. Garnish and Serve: Remove from heat, garnish with fresh parsley, and serve immediately.

The steps provided will guide you in creating this amazing dish effortlessly.