Creating Mushroom Stuffed Chicken can be straightforward if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Stuffing: In a skillet, heat 1 tablespoon of olive oil over medium heat. Add the minced garlic and cook for about 30 seconds until fragrant.
3. Sauté Vegetables: Add the chopped mushrooms and spinach to the skillet and sauté until the mushrooms are tender and the spinach has wilted, about 5 minutes.
4. Mix Filling: In a bowl, combine the sautéed mushrooms, spinach, cream cheese, and shredded mozzarella. Add thyme, oregano, salt, and pepper. Mix until well combined.
5. Prepare Chicken: While the stuffing cools, pat the chicken breasts dry with paper towels. Carefully slice a pocket into each chicken breast without cutting all the way through.
6. Stuff Chicken: Generously fill each chicken breast with the mushroom filling, securing the opening with toothpicks if necessary.
7. Sear Chicken: In the same skillet, add the remaining tablespoon of olive oil. Once hot, add the stuffed chicken breasts and sear for 4-5 minutes on each side or until golden brown.
8. Bake Chicken: Transfer the seared chicken to a baking dish. Optionally drizzle with balsamic vinegar for extra flavor. Bake in the preheated oven for 25-30 minutes or until the chicken is cooked through (internal temperature of 165°F/75°C).
9. Rest and Serve: Remove the chicken from the oven and let it rest for about 5-10 minutes before serving. This helps retain moisture.
10. Garnish: Garnish with fresh parsley before slicing and serving.

These steps will guide you in creating delightful Mushroom Stuffed Chicken that is both easy and satisfying.