This is one of the better recipes I have tried from the Kraft website. I adjusted the recipe, like I normally do, but this is a very good base recipe.
I "doubled" the recipe to make two pies, one for freezing. I doubled the amount of mushrooms, eggs, milk, cheese and pie crusts (of course). I used 16 oz. of spinach and one large onion, and that was plenty for two pies. I replaced the Miracle Whip with 8 oz of softened cream cheese, just because it was what I had in the house.
Be sure to season the eggs with salt and pepper too, otherwise the recipe is a little bland.