My family loves ratatouille. When my DS went away to college last year he was happy to see it being served in the food court one night. His friends were like, "Dude, that looks nasty. What's in it?" and DS matter-of-factly said, "Eggplant. My Mom makes this all the time."
I use this recipe from allrecipes.com, but mine never turns out the same way twice, since I tend to take great liberties with recipes when I cook!

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2 T. olive oil
3 cloves garlic, minced, or 1/2 tsp. garlic powder
2 tsp. dried parsley
1 eggplant, cut into 1/2 inch cubes
salt or garlic salt
1 c. Parmesan cheese
2 zucchini, sliced
1 large onion, sliced in rings
2 c. sliced fresh mushrooms
1 green pepper, sliced
2 lg. tomatoes, chopped
*I also add chunks of cooked chicken breast, mozzarella cheese, and Italian seasoning.
Preheat oven to 350 degrees. Coat large casserole dish with 1 T. olive oil. Spread eggplant evenly in bottom of dish. Sprinkle with parsley, a few T. of Parmesan and any additional seasoning you choose. Layer zucchini, lightly salt and sprinkle with more cheese. Layer rest of veggies, sprinkling each layer with more salt and cheese. Drizzle with remaining olive oil. Bake for 45 minutes.
Note: You can saute the eggplant and garlic beforehand, but we don't like our veggies too mushy, so I skip that step and just throw everything together and bake it. Works great!

Also, we just serve it with french bread, since it's plenty filling all on its own. Enjoy!