This is well worth the effort to make, it's a fabulous dish! to save time the lamb sauce and the white sauce can me made up to 2 days ahead and refrigerated. The best canned tomatoes and sauce will make a difference to the meat sauce, so try and purchase a good quality product for this recipe and of coarse all recipes! If you are not a feta lover then substitute mozzarella cheese for the feta. The recipe states 12 lasagna noodles, I usually cook a couple more just in case a couple tear while boiling.