Preheat your oven to 375°F (190°C).
Season chicken breasts with salt, pepper, paprika, and thyme.
Heat olive oil in a skillet over medium heat and sear chicken for 2 minutes per side. Remove and set aside.
In the same skillet, sauté garlic and mushrooms until softened.
Add heavy cream and simmer for 3-4 minutes.
Transfer chicken to a baking dish and pour the mushroom sauce over it. Top with mozzarella cheese.
Bake for 20-25 minutes until chicken is cooked through and cheese is golden.
Let rest for 5 minutes before serving.