Spinach, Mushroom and Goat Cheese goodness Omelette

My lovely sister sent me a recipe similar to this and I just made a few modifications. It's AWESOME.

Each makes one omelette

Ingredients:
3 large eggs
1/4 cup spinach leaves (wilted)
1/4 cup mushrooms (I used canned organic from Trader Joes)
1/4 cup fresh goat cheese
1/2 cup milk
1 1/2 teaspoons of cream of tartar
cooking spray
salt and pepper to taste

Directions:
Turn your oven broiler on. Break your eggs in a medium sized bowl and beat until consistent. Add milk and cream of tartar. Spray a frying pan even on bottom and sides with cooking spray and place on burner on medium heat. Let your pan get warm evenly and then pour your egg mixture into the pan. Cook until you see the egg has cooked on the bottom, you'll see air pockets bubbling to the surface. Take off heat and add your spinach, mushrooms and goat cheese on the top. Place in the broiler for about two minutes. Once cooked you see the top of the egg is not runny at all. Use a spatula to loosen the egg from the frying pan and let it slip onto a plate. Turn one side over giving the appearance of the omelette above. Add salt and pepper to taste.

Deviations:
-You can use frozen spinach instead of fresh, just make sure to defrost it in the microwave.
-For more cheese, use some sharp cheddar
-Cream of Tartar is not imperative, just gives the egg more fluff
-Milk is not imperative, adds more fluff and increases the solid matter
-I highly recommend not using butter to coat your frying pan, I tried once with butter and once with cooking spray and had much better luck getting the omelette out with the cooking spray