Preheat oven to 375. Line cookie sheet with aluminum foil and coat with oil. (You can use a pastry brush or your fingers).
Peel and slice eggplant about 1/4 inch thick. In a small bowl whisk the egg and water together. Pour the gluten free breadcrumbs in a bowl and set aside.
Dip the eggplant slices in the egg mixture and then in the bread crumbs and set on baking sheet.
Once you've finished the process drizzle the garlic olive oil on each slice of eggplant.
Place in oven and bake for 15 minutes, turn teach slice over and bake for another 15-20 minutes. When finished cooking it should be a nice golden brown.
After coming out of the oven sprinkle truffle salt all over it.
They can be served hot or cold. Enjoy!