Preheat oven to 350 degrees.

Fry the onions in a large pan with the oil until they are turning brown.

Add the black pepper, garlic powder, salt, mushrooms and cook for 5 minutes.

Mix the eggs and add it into the pan.

Then add all the cheese or half of the cheese and cook. If you added only half of the cheese then add the rest of the cheese after you pour it into your baking dish.

Put the mixture into cupcake baking pan or regular baking pan. Then bake for about 45 minutes or until the top begins to turn brown.