Step 1: Sear the Chicken: Heat olive oil in a large, oven-safe pot or Dutch oven over medium-high heat. Add chicken pieces and cook until browned on all sides. It's not necessary to cook the chicken through at this point, as it will continue to cook in the oven. Remove the chicken from the pot and set aside.
Step 2: Saut the Vegetables: Add chopped onion and sliced mushrooms to the pot and cook until softened, about 5-7 minutes. Stir in minced garlic and cook for another minute until fragrant. This step builds a flavorful base for the creamy sauce.
Step 3: Create the Cream Sauce: Pour chicken broth into the pot, scraping up any browned bits from the bottom. Add heavy cream, softened cream cheese, dried thyme, salt, and pepper. Stir until the cream cheese is fully melted and the sauce is smooth. This creates the luxurious, creamy foundation of the dish.
Step 4: Combine Ingredients: Return the seared chicken to the pot with the cream sauce. Stir in frozen peas. Ensure all ingredients are evenly distributed. This combines the protein, vegetables, and sauce into a cohesive mixture.
Step 5: Bake the Dish: Sprinkle shredded mozzarella cheese evenly over the top of the chicken mixture. Place the pot in a preheated oven at 375F (190C) and bake for 25-30 minutes, or until the cheese is melted and bubbly and the chicken is cooked through. The baking process allows the flavors to meld and the cheese to melt into a golden, irresistible topping.
Step 6: Rest and Serve: Remove the creamy chicken bake from the oven and let it rest for a few minutes before serving. This allows the sauce to thicken slightly and prevents burning. Serve hot, either on its own or over rice or pasta.
Optional Tips: For added flavor, consider browning the chicken with a sprinkle of paprika or garlic powder. To substitute, use any cheese you like and feel free to add more or different vegetables, such as carrots or broccoli.