The eggplant lasagna idea is great! I will have to try that too!
I love roasted or grilled eggplant; simple but very yummy. I like to coat them with extra virgin olive oil, salt & pepper, and then roast in a 400 degree oven until they are soft. After you let them cool, you can peel off the skin & then use the "innards" for dip. To make baba ganoush, mash in minced/grated garlic, salt, pepper, tahini, and lemon juice. You can also dice them into smaller pieces, coat with oil, salt & pepper, and roast until golden. To grill, slice into thick slices, oil/salt/pepper, and then grill.
All yum!