Follow these easy steps to create your Creamy Chicken Casserole:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook Noodles: In a large pot of boiling salted water, cook the egg noodles according to package instructions until al dente. Drain and set aside.
3. sauté Vegetables: In a large skillet, heat the olive oil over medium heat. Add the frozen mixed vegetables and sauté until heated through, about 3-5 minutes.
4. Mix Sauces: In a large bowl, combine the cream of chicken soup, chicken broth, sour cream, garlic powder, onion powder, salt, and pepper. Mix until smooth.
5. Combine Ingredients: Add the cooked chicken, cooked noodles, and sautéed vegetables to the bowl. Stir until everything is evenly coated in the sauce.
6. Transfer to Baking Dish: Pour the mixture into a greased 9×13 inch baking dish and spread it evenly.
7. Add Cheese: Top the mixture with shredded cheddar cheese, distributing it evenly over the top.
8. Bake: Place the baking dish in the preheated oven. Bake for 30-35 minutes, or until the cheese is melted and bubbly, and the edges are slightly golden.
9. Let It Set: Remove from the oven and let the casserole sit for about 5-10 minutes before serving.

These steps will guide you in creating an incredible Creamy Chicken Casserole that is sure to be a hit.