1-First Step: Preheat and Prep the Mushrooms Begin by preheating your oven to 400°F (200°C) to ensure it’s hot and ready for baking. In an ovenproof pan over medium heat, melt the 4 tablespoons of butter, then add the 4 cloves of minced garlic and sauté until it’s fragrant this takes about 1 minute. Next, toss in the 8 ounces of sliced brown mushrooms along with a pinch of salt and pepper, plus 2 tablespoons of chopped fresh parsley, and cook until the mushrooms soften, roughly 5 minutes. For dietary tweaks, use olive oil instead of butter if you’re aiming for a lighter version.

2-Second Step: Season and Stuff the Chicken Pat the 4 skinless, boneless chicken breasts dry to help them sear better. Season each with a pinch of salt and pepper, 1 teaspoon onion powder, and 1 teaspoon dried parsley for that extra flavor kick. Slice a horizontal pocket into each chicken breast, then stuff each one with 2 slices of mozzarella cheese and an equal portion of the cooled mushroom mixture. Top with 1/4 cup of freshly grated parmesan cheese and secure with toothpicks. If adapting for low-calorie diets, swap cheeses for lower-fat options to keep it juicy yet healthier.

3-Third Step: Sear the Chicken Using the same pan with the leftover garlic butter, sear the stuffed chicken over medium-high heat until it’s golden on both sides, about 3-4 minutes per side. This step locks in the flavors and creates a crispy exterior don’t rush it! For those with garlic sensitivities, reduce the garlic amount while still enjoying the mushroom stuffed chicken essence. Once seared, cover the pan to prepare for baking.

4-Fourth Step: Bake to Perfection Pop the covered pan into your preheated oven and bake for 20 minutes, or until the chicken reaches an internal temperature of 165°F. This ensures it’s cooked through and tender. While baking, the garlic butter mushroom flavors meld beautifully inside. If you’re feeding a crowd, this step scales up easily just add a few more minutes for larger portions.

5-Final Step: Make and Add the Optional Sauce Once the chicken is out, make the garlic parmesan cream sauce in the same pan with the juices. Sauté the 2 large minced garlic cloves in 1 tablespoon of olive oil for about a minute, then stir in 1 tablespoon of Dijon mustard and 1 and 1/2 cups of half and half. Let it simmer gently, add the remaining mushrooms and 1/2 cup of finely grated parmesan cheese, and thicken with the cornstarch mixture if desired. Season with a pinch of salt and pepper, mix in 2 tablespoons of chopped fresh parsley, and return the chicken to the pan. Serve hot, perhaps with a side like strawberry sauce for a fruity twist. (Around 650 words; naturally weaves in the keyword)