This casserole makes a quick, well-balanced meal with things you have on hand! If you don't have spinach you can substitute it for a vegetable you do have!
Be sure to buy good-quality dried porcini mushrooms (with large white cross sections). Cheaper ones are dark and shriveled and have an overly pungent aroma, which will give the stew an off taste.
This Lazy Lasagna with Lamb Ragu, Spinach, and Ricotta recipe contains ground lamb, lasagna noodles, ricotta cheese, Parmigiano-Reggiano cheese, milk and more.