Creating Healthy Mushroom Stuffed Chicken Breast can be a joyous experience if you follow these clear and easy steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Filling: In a skillet, heat olive oil over medium heat. Add minced garlic and chopped mushrooms. Sauté until the mushrooms become tender, about 5-7 minutes. Stir in dried thyme and cook for another minute.
3. Prepare the Chicken: While the filling cooks, place the chicken breasts between two sheets of plastic wrap. Gently pound them with a meat mallet to achieve an even thickness of about 1/2 inch. Season both sides with salt and pepper.
4. Stuff the Chicken: Remove the filling from heat and let it cool slightly. Take a portion of the mushroom mixture and place it in the center of each chicken breast. Fold in the sides and roll to enclose the filling.
5. Secure the Chicken: Use toothpicks or kitchen twine to secure the rolled chicken breasts, ensuring the filling stays intact during cooking.
6. Arrange in Baking Dish: Lightly coat a baking dish with cooking spray. Place the stuffed chicken breasts in the dish, seam-side down.
7. Bake: Place the dish in the preheated oven and bake for about 25-30 minutes or until the chicken is fully cooked and the internal temperature reaches 165°F (75°C).
8. Let it Rest: Once cooked, remove the chicken from the oven and let it rest for about 5 minutes. This helps the juices redistribute for a juicier result.
9. Serve: After resting, take out the toothpicks or twine. Slice the chicken and serve warm, ideally with your favorite side dishes.

With these simple steps, you can enjoy a healthy and flavorful meal that showcases the tender chicken and rich mushroom filling perfectly.