Season the chicken breasts on both sides with sea salt and fresh ground black pepper.
Heat oil in a large skillet* over medium heat, and brown the chicken, for about 2-3 minutes on each side (at this point, the chicken will not be fully cooked as we will continue to do so, later on, with sauce). Set aside on a plate.
In the same preheated pan, add the onions, garlic, sun-dried tomatoes and mushrooms, and sauté for about 5 minutes.
Take half of the thyme sprigs, pull the leaves off of the stems and add them to the pan. Pour in the chicken stock and bring to the boil.
Mix well with a wooden spoon*, scraping any brown bits left on the pan's bottom.
Stir in the heavy cream and reduce the heat. Once simmering, return the chicken to the pan, nestling it into the sauce.
Reduce the heat to a simmer and cook for additional 8-10 minutes, or until the chicken is cooked through and the sauce has thickened.
Garnish with the remaining thyme.
Please read the Tips & Tricks in the article before making this easy chicken and mushrooms recipe. Below is just a summary:
Use your favorite mushroom mix. I made this creamy garlic mushroom chicken with King trumpet, Crimini and Enoki mushrooms, but you can also make it with Porcini, Portobello, Button, Oyster, Chanterelle.
See how to pick and store mushrooms at Tip #2.
You can make this creamy garlic mushroom chicken with breast or thighs, and you can also replace the chicken with turkey or shrimps.
Sprinkle shredded Parmesan, Gruyere or Cheddar for extra flavor. See more at Tip #3.
Serve with roasted veggies, or a chopped or greens salad, to keep it Keto. If you're not dieting, add pasta and a good idea would spaghetti al-dente.