I got the basis for this recipe (proportions) off a Barilla box years ago. I've tweaked it, adding elements of other lasagne I've liked, until my husband told me it was perfect. Then I started taking it to pitch-ins, and was told by many that it was the best they'd ever had, too!
I think it melds elements of good, American-style lasagne: spicy meat, good cheeses, a rich blend of spices, and spinach.
The key is the sauces and cheese blend. Get as many different Italian cheese in this as you can! I've used a mozzarella/sun-dried tomato/basil blend for the mozzarella, and that was excellent, too.