01 -
Season the chicken breasts with salt and pepper on both sides. Heat olive oil in a large skillet over medium-high heat. Cook the chicken for 6-7 minutes per side, or until golden brown and cooked through (internal temperature should reach 75°C). Remove from skillet and set aside.
02 -
In the same skillet, melt butter over medium heat. Add the chopped onions and sauté for 2-3 minutes until softened. Add the mushrooms and garlic, then cook for another 5 minutes, stirring occasionally, until the mushrooms release moisture and become golden brown.
03 -
Pour in the white wine or chicken broth, scraping the skillet to release browned bits. Cook for 2-3 minutes to reduce. Add heavy cream, chicken broth, and Dijon mustard, stirring to combine. Simmer the sauce for 5 minutes until slightly thickened.
04 -
Stir in Parmesan cheese and cook for 1-2 minutes until the sauce is smooth and creamy.
05 -
Return the chicken breasts to the skillet, spoon the sauce over the chicken, and simmer for 3-5 minutes to reheat the chicken and meld the flavors. Garnish with fresh parsley and serve hot with rice, mashed potatoes, or steamed vegetables.