Spinach Mushroom Quiche

This is a standard Brunch recipe for our family.  It's super easy, it always comes out good and every loves it. 

Ingredients:

6 eggs
1 16 oz package of frozen, chopped spinach
1 package of sliced fresh mushrooms
1 medium onion, chopped
1-2 T. oil
1 frozen deep dish pie crust
1 ½ cups of shredded cheddar cheese
Salt and pepper to taste
Preparation:

Thaw frozen spinach and drain very well. Saute onions and mushrooms in a skillet until lightly brown. Add spinach and warm through. Beat eggs in a large bowl. Combine spinach mixture, beaten eggs, cheese, salt and pepper and pour into frozen pie crust. Bake at 350 degrees for 1 hour or until set. Cool slightly before serving.