- Preheat the oven to 350°F (175°C).
- In a large bowl, combine the cooked chicken, mushrooms, gluten-free pasta, chicken broth, cream, garlic powder, onion powder, salt, and pepper.
- Mix well until all ingredients are combined.
- Transfer the mixture to a greased casserole dish.
- Top with shredded cheese.
- Bake in the preheated oven for 25-30 minutes, or until the cheese is bubbly and golden.
- Let it cool for a few minutes before serving.
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