Caramelized Onion and Potato Frittata with Ham and Swiss

I was going to make a really simple frittata for dinner but I changed the ingredients once I saw this recipe on What's Cookin' with Mary? What goes better with eggs than caramelized onion, potatoes, ham, and cheese? This dish took a few extra minutes to prep but it was worth it! I loved the flavor combination - all of the ingredients just work really well together. My husband and I both REALLY