This recipe for frying pan lasagna is just further proof of 1) my undying love for my cast iron frying pan and 2) my undying search for any way to get out of the complicated production that is involved in making traditional lasagna. This version is chock full of pasta and cheese and beef and yes, a little spinach for good luck. It's easy and scrumptious and requires only one frying pan and exactly zero struggling with floppy wet lasagna noodles. So if you, like me, are a lover of lazy lasagna recipes, let's make it!