I made an eggplant lasagna from a different source but was very similar to this one, I added sliced zuchini as well and sliced fresh tomatoes, some ricotta cheese(fat free). The trick with eggplant is to lay them on baking sheet and sprinkle with salt and pepper and spray with a bit of Pam and roast them in the overn prior to building your lasagna.
Very nutritious and excellent.