In medium bowl, mix together eggs, ricotta, spinach, salt and cilantro; set aside.
In separate bowl, combine cheeses.
In separate bowl, add 1 jar spaghetti sauce, cumin and black beans, mixing well.
Lightly grease a 9"x13" baking dish layer half the lasagna, spinach mixture, cheese mixture and bean mixture. Repeat the layers. Pour the remaining jar of sauce over the top. Cover tightly with foil and bake for 1 hour.