If two cheeses are better than one, then three cheeses must be better than two. You can experiment with different cheeses like Pecorino Romano or feta cheese and the result will be just as good.
I felt this was more of a quiche than a gratin but it turned out pretty good. I thought it could use some kick so next time I'd add some cayenne pepper. - 09 Jun 2018 (Review from Allrecipes USA and Canada)