Heat up a Teflon pan with about a tablespoon of olive oil. Because you are going to have to put it in the oven to finish cooking you will need an oven proof pan. Thinly slice an onion and peeled potato and saute until both the onion and potato are cooked. This usually takes about 10-15 minutes depending on the thickness of the onion and potato. Season with salt and pepper.
While the potato and onions are cooking, beat two eggs and two egg whites together with salt and pepper. When the onions and potatoes are cooked, pour the eggs on top of them. Cook for about five minutes. To finish cooking the top of the frittata, put it under the broiler but keep on checking it. It is done when the frittata is browned nicely on top. You can sprinkle some Parmigiano-Reggiano on the top if you would like.
You can cut the frittata into slices and serve it with a fresh spinach salad. Enjoy (hope you enjoy the recipe, Jen)!

Thank you so much, Vince. Mmm... this sounds so good. I will be making it very soon. I've never tried a frittata before, but now I can't wait! I will enjoy it for sure. :)