Spinach and Mushroom Layered Casserole

Spinach, mushrooms and cheese seem to belong together.  They taste fantastic!  This recipe is no exception. When I first ran across this tasty casserole it was made quite differently than it would be today. It called for 6 tablespoons of butter and a teaspoon of salt.  That seemed too much to me, so I’ve changed it up, making it healthier and lighter. First, I used coconut oil to sauté the mushrooms. That is healthier and lighter....