Spinach Potatoe Gratin

This Recipe came from Good Housekeeping Family Vegetarian Cooking a gift from my lovelies CassieMac and KornRolla. I made it 3 days ago and although it was good, I couldn't help but feel like it was missing something (or maybe a few things). SO I'm writing down for ya'll the original recipe and ALSO my twist on it.

    ORIGINAL RECIPE

1 tablespoon of butter 

3 large shallots

2 packages of frozen chopped spinach

1/2 teaspoon of salt

1/2 teaspoon of coarsely ground black pepper

1/8 teaspoon of nutmeg

3 pounds all-purpose potatoes (7-9 medium potatoes)

4 ounces of Gruyere cheese (1 cup)

1 1/2 cups milk

1 cup heavy cream

1 tablespoon cornstarch

    YARI'S MORE BADASS RECIPE

1 tablespoon of butter

3 large shallots

2 packages of frozen chopped spinach

Always salt to taste (some people like a lot of salt some don't! Always start with less then add more)

1 teaspoon of coarsely ground black pepper

A little less than a teaspoon of nutmeg

3 pounds of all purpose potatoes (7-9 medium potatoes)

6 or 7 baby bella mushrooms 

1 1/2 cup of white sharp cheddar cheese ( Gruyere~ Expensive and way too mild for this luscious dish!)

1 cup of milk

3/4 cup of heavy cream 

1 tablespoon of cornstarch