In a large mixing bowl, combine the shredded chicken, cauliflower, and broccoli.
In a separate bowl, mix the cream cheese, half of the cheddar cheese, parmesan cheese, chicken broth, minced garlic, onion powder, paprika, salt, and pepper until smooth.
Pour the cheese mixture over the chicken and vegetables, stirring until everything is coated evenly.
Transfer the mixture to a greased 9x13 inch baking dish, spreading it into an even layer.
Sprinkle the remaining cheddar cheese on top of the casserole.
Bake in the preheated oven for 25-30 minutes, or until the casserole is bubbly and the cheese is golden brown.
Remove from the oven and let it cool for a few minutes before serving.
Garnish with fresh parsley if desired.
Notes
Serve in individual bowls with extra chicken broth for added moisture and garnish with fresh parsley.