Creating Gouda & Mushroom Stuffed Chicken is simple if you follow these 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 diced onion and sauté until translucent.
3. Add Mushrooms and Garlic: Add chopped mushrooms and minced garlic to the skillet. Cook until the mushrooms are soft and any liquid has evaporated.
4. Mix in Cheese and Seasonings: Remove the skillet from heat. Stir in shredded Gouda cheese, thyme, paprika, salt, and pepper until well combined.
5. Prepare Chicken Breasts: Place chicken breasts on a cutting board. Using a sharp knife, carefully create a pocket in each breast.
6. Stuff the Chicken: Fill each pocket with the Gouda and mushroom mixture, ensuring they are generously filled.
7. Seal the Chicken: If desired, use toothpicks to secure the opening of each stuffed chicken breast.
8. Place in Baking Dish: Arrange the stuffed chicken breasts in a greased baking dish. Optionally, sprinkle breadcrumbs on top for added texture.
9. Bake: Bake in the preheated oven for 30-35 minutes, or until the chicken is cooked through and reaches an internal temperature of 165°F (75°C).
10. Rest Before Serving: Remove from the oven and let the chicken rest for a few minutes before serving.

These straightforward steps will guide you in making this incredible dish effortlessly.