Sadly I wasn't trying to make an egg pizza here, but that's what happened to my hoped for Mushroom-Poblano Fittata when I used a 12" skillet instead of a 10" one. In my defense, the recipe just calls for a "medium non-stick skillet"... which is admittedly a little vague... but I've made enough frittatas to know you need to use a smaller diameter skillet to get the right depth. The flavors were good, though the eggs (unsurprisingly) ended up a little overcooked... I would definitely try it again with the proper pan.
Can't win 'em all.