When you’re making this dish it may look like you have way too many zucchini slices for your average sized skillet, even Guillermo was skeptical when we first made it. Don’t be alarmed, once the zucchini start softening they shrink quite a bit. Another tip is to get some help when you’re going to flip it. Make sure you have a good grip on the pan, place a large plate on top and with one swift motion invert the pan while firmly holding the plate. It is important not to hesitate, or you could end up with a frittata disaster.