Moussaka is basically a greek lasagne (originally made with lamb mince) but instead of using pasta you use eggplant. Another idea is eggplant parmigan (sp??) where you crumb slices of eggplant, and fry or (healthier option) bake/grill them til the crumbs golden up, then layer up and top with a tomato sauce and parmesan cheese.
Some Larger eggplants can be bitter so slice them and sprinkle with salt, leave them for about 15mins-half hour in strainer and then pat dry.
Another idea is Ratatouille, which is almost like a vege stew cooked in tomato sauce, made with capsicum, courgettes, onions, eggplant garlic and herbs.
If not sure about making try googling names and that should bring up some recipes.
Hope that helps or gives you a few extra ideas