To ensure that the lasagna doesn't come out watery, it's important that the greens go in dry. Let all the water evaporate during cooking, and then blot the leaves with a paper towel if necessary after removing them from the saute pan.
The cremini mushrooms bring selenium and potassium, not to mention a wealth of B vitamins, to this dish. Heat aids in the availability of certain carotenoids, so the cancer-fighting antioxidant lycopene present in the tomatoes grows even more powerful through the cooking process. This dish is great paired with a slice of thick-cut whole-grain bread or a serving of healthy brown rice.