A frittata is the ultimate easy-on-the-cook egg dish for breakfast or brunch. It's impressive-looking enough to serve for a crowd, but simple enough to put together for a quick breakfast. If you have the time, for a nicely browned cheese topping, you should pop the frittata under a hot broiler for 2 to 3 minutes after you complete step 3. If the handle on your skillet is not flameproof, you need to cover it with heavy-duty foil. Also, this frittata is extremely versatile. You could substitute other vegetables, such as zucchini, chopped broccoli, or tomatoes, and other cheeses, such as feta or Monterey Jack, instead of what we call for here.