Instructions:

1. **Preheat the oven:**
– Preheat your oven to 375°F (190°C).

2. **Prepare the chicken:**
– Season the chicken breasts with salt and pepper on both sides.
– Heat the olive oil in a large skillet over medium-high heat. Sear the chicken breasts for about 2-3 minutes on each side until golden brown. (They don’t need to be cooked through, as they will finish cooking in the oven.)
– Place the seared chicken breasts on a parchment-lined baking sheet.

3. **Cook the mushrooms:**
– In the same pan, add the butter. Once melted, add the mushrooms and sliced ​​onions. Cook until the mushrooms are golden and the onions are tender, about 5 to 7 minutes.
– Add the minced garlic and cook for another minute until fragrant.
– (Optional) Pour in the chicken broth or white wine to deglaze the pan, scraping up any browned bits from the bottom. Simmer until the liquid is reduced by half.
– Season with salt and pepper to taste.

4. **Assemble the dish:**
– Pour the mushroom and onion mixture over each chicken breast.
– Sprinkle the grated cheese generously over the top of the mushrooms.

5. **Bake the Chicken:**
– Place the baking sheet in the preheated oven and bake for 20-25 minutes, or until the chicken is cooked through and the cheese is melted and bubbly.
– If you want a more golden top, you can broil the chicken for the last 2-3 minutes of cooking.

6. **Serve:**
– Garnish with freshly chopped parsley and serve the chicken hot, accompanied by vegetables, rice or a salad.

This **Baked Chicken with Mushrooms and Cheese** is a comforting and tasty dish that will definitely be a hit at your table. Enjoy!