Ingredients :

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* 1 egg, lightly beaten
* 1 cup mayonnaise
* 1/8 teaspoon ground black pepper
* 3 cups finely shredded Cheddar cheese
* 1 onion, finely chopped

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Method :

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1. Preheat oven to 325 degrees F (165 degrees C). Spray a 1-quart baking dish with cooking spray.
2. In a bowl, mix the egg, mayonnaise, and pepper. Stir in the Cheddar cheese and onion, and transfer to the prepared dish.
3. Bake 25 minutes in the preheated oven, until golden brown.