Creating Easy Chicken Tetrazzini is straightforward. Just follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Cook the Pasta: Cook the rotini pasta according to package instructions until al dente. Drain and set aside.
3. Prepare the Sauce: In a large mixing bowl, combine the cream of mushroom soup, chicken broth, salt, and pepper. Stir until smooth.
4. Add Chicken: Mix in the shredded cooked chicken and frozen peas, if using.
5. Combine Ingredients: Add the cooked pasta to the mixture and stir until everything is well combined.
6. Transfer to Baking Dish: Pour the mixture into a greased 9×13-inch baking dish, spreading it evenly.
7. Top with Cheese: Sprinkle the shredded cheddar cheese evenly over the top of the pasta and chicken mixture.
8. Bake: Place the baking dish in the preheated oven and bake for 20-25 minutes, or until the cheese is melted and bubbly.
9. Cool Slightly: Once done, remove from the oven and let it cool for a few minutes before serving.

These simple steps will guide you through creating this incredible dish with ease!