Melt butter in sauté pan, add onion, garlic, mushrooms, Our Family Salt and pepper and cook over medium heat until softened, about five minutes.
Sprinkle 1⁄2 cup of Our Family Fancy Sharp Cheddar and half of the mushroom mixture over the bottom of the pie crust.
Whisk eggs, Our Family Vitamin D Milk, Our Family Heavy Whipping Cream and remaining cheese and mushroom mixture together until incorporated and pour into crust.
Bake at 325° for and hour and 15 minutes or until the center is set.