Boil water in a large pot. Add pasta and cook according to package instructions until al dente. Drain and set aside.

In a skillet, add cooked chicken and chopped broccoli. Sauté for 5 minutes until broccoli is tender.

Add the cooked pasta, tomato sauce, garlic powder, Italian seasoning, salt, and pepper to the skillet. Stir well to combine and heat through for another 5 minutes.

Remove from heat and sprinkle shredded cheddar cheese on top. Serve warm.