1-First Step: Gather and prep your ingredients to make things smooth. Start by preheating your oven to 200°C / 390°F (or Fan 180°C / 356°F) so it’s ready when you are. Slice the mushrooms about 3mm thick, mince the garlic, and chop the spinach if needed. This mise en place helps everything move quickly and reduces stress during cooking.

2-Second Step: Prepare the chicken by cutting a pocket into the side of each breast. Use a sharp knife to slice where the meat folds, but don’t go all the way through aim for a deep pocket. Season the inside and outside with half of the salt and pepper for even flavor distribution. This step ensures the stuffing stays put and the chicken tastes great throughout.

3-Third Step: Cook the mushroom mixture in a heavy, oven-proof skillet. Melt the 30g of unsalted butter over high heat, then add the 200g of sliced mushrooms. Let them cook for about 3 minutes until they’re golden, stirring occasionally for that perfect browning. For dietary tweaks, you could use oil instead of butter if you’re going dairy-free.

4-Fourth Step: Boost the flavors in the skillet. Add the 2 minced garlic cloves, 1/2 teaspoon of thyme leaves, and the rest of the salt and pepper. Cook this for another 2 minutes until the mushrooms are well browned and aromatic. If you’re substituting herbs, like oregano or rosemary, toss them in here to match your preferences.

5-Fifth Step: Wilt the greens to complete the stuffing. Stir in the 2 cups of baby spinach and cook for about 30 seconds until it’s just wilted. This quick step keeps the spinach vibrant and adds nutrition without making the mixture soggy. Alternatives like kale work well if that’s what you have, just adjust cooking time slightly for tougher greens.

6-Sixth Step: Stuff and seal the chicken. Spoon the mushroom and spinach mixture into the pockets of the chicken breasts, then top each with 80g of sliced mozzarella. Use 2 or 3 toothpicks to seal the pockets mostly closed don’t worry about a perfect seal. For variations, you could add extras like chopped bacon here to customize the filling.

7-Seventh Step: Sear the chicken for a crispy exterior. Wipe the skillet clean, then heat 1 tablespoon of olive oil over medium-high heat. Place each stuffed chicken breast in the skillet and cook for about 1.5 minutes per side until golden brown. This step locks in juices and adds that appealing color, but watch the heat to avoid burning.

8-Eighth Step: Finish in the oven for tender results. Transfer the skillet to the preheated oven and bake for 15 minutes, or until the internal temperature hits 65°C / 149°F. Use a thermometer to check, as this ensures juicy chicken without overcooking remember, some guidelines suggest 75°C for safety, so adjust if needed. For larger breasts, add a couple of minutes to keep things perfect.

9-Ninth Step: Rest and serve the dish. Take the chicken out of the oven, place it on a plate, and loosely cover with foil. Let it rest for 5 minutes to let juices settle, making every bite moist and flavorful. Serve with sides like veggies or rice for a complete meal that’s sure to delight.