Preheat oven to 350 degrees. Lightly oil a casserole dish.
Combine the chicken and broccoli in a large bowl. Add the softened cream cheese and melted butter, stir well.
Add all remaining ingredients except the Monterey Jack cheese. Stir well to blend and pour into the baking dish.
Sprinkle the Monterey Jack cheese on top. Bake for 45 minutes to one hour.
Submitted by Heidi - Winning Recipe in the Favorite Casserole Recipe Contest