Sorry I dont have any exact measurements for this but it's incredible and VERY easy ...so give it a try. The amounts listed are estimates and can be varied according to taste. (this mix is used in a crescent-braid that I bring as an appetizer to parties but, sadly, I cant eat it that way any more so I decided to enjoy the portion that was suitable for my diet.
Your basic goal is to create what will look like a semi-dry chuncky chicken salad mix that you will then bake in the oven...so the amounts used will depend on how many you are feeding and personal tastes.
Ingredients:
4 cups Cooked Chicken (cut into small chunks)
1 cup Chopped Broccoli (I use the frozen)
1 cup Chopped Spinach (optional but personally can't make this without it)
1 tablespoonGarlic (powder or crushed)
1 tablespoonDill weed
1.5 cups Cheddar cheese (shredded-loose...dont pack it tightly)
1/4 cup Parmesan(shredded)
Mayonaisse (base amount on mixture consistency...should look like a semi-dry chicken salad mix when done)
dash salt & pepper
Mix all ingredients in a large bowl (add Mayo last) then pour into a casserole dish...
Bake at 350 until cheese is melty, then stir mixture once
Bake for an additional 10 minutes.

Serve with salad
Also good cold on bed of lettuce.
Let me know if you try it...Cant tell you how often it's requested by family and friends for parties (of course they want it in the crescent-braid form, but such is life)
(sigh)