1. Add water to a large pot; bring to a boil.
2. Add in eggplant and onion; cook for 10 minutes or until vegetables are tender; drain well; set aside.
3. In a bowl, mix together eggs, green chiles, hot sauce, cheddar cheese, and Monterey Jack cheese.
4. Add in eggplant mixture; beat using an electric mixer on medium speed until mixture is smooth.
5. Spoon mixture into a 1-quart casserole that has been sprayed with non-stick cooking spray.
6. Mix together the cracker crumbs and melted butter; sprinkle over the casserole.
7. Bake in a 375° oven for 45 minutes or until pick comes out clean.
8. Serve with picante or salsa.