Preheat Oven: Preheat your oven to 375°F (190°C).
Prepare Chicken: Season the chicken breasts with salt and pepper. Set aside. 3.
Sauté Onions and Garlic: In a large oven-proof skillet, heat olive oil over medium heat. Add chopped onions and garlic, cooking for 2-3 minutes until softened.
Add Mushrooms: Stir in the sliced mushrooms and continue to sauté until they become tender, about 5 minutes.
Brown the Chicken: Push the vegetables to the side of the skillet and add the chicken breasts. Brown on both sides for 4-5 minutes.
Make the Sauce: In a bowl, mix together the heavy cream, chicken broth, Dijon mustard, and fresh thyme. Pour this mixture into the skillet, ensuring the chicken is submerged.
Deglaze the pan with apple cider.
Bake: Cover the skillet with a lid or foil and transfer it to the preheated oven. Bake for 30-35 minutes, or until the chicken is cooked through.
Garnish: Remove from the oven and sprinkle freshly chopped parsley on top before serving. Follow these steps, and you’ll have a delightful casserole ready in no time!
