Place the eggplant on a baking sheet lined with paper towels. Using 1 teaspoon of the salt, liberally salt both sides of each eggplant medallion. Let the eggplant sit for 40 minutes. Wipe the excess salt and moisture from the eggplant and set aside.
1 eggplant, 1 1/2 teaspoon salt
Place the flour and cornstarch in a bowl and whisk to combine. Set aside. Place the eggs and breadcrumbs in separate bowls. Stir 1/2 cup of the Parmesan cheese and the remaining salt in with the breadcrumbs.
½ cup all-purpose flour, ½ cup cornstarch, 2 eggs, 1 1/2 cups whole wheat breadcrumbs, 1 cup grated Parmesan
Take a piece of eggplant and dip it first in the flour then the egg then the breadcrumb mixture. Set the breaded eggplant piece on a baking sheet and repeat until you run out of eggplant.
Pour the canola oil into a large cast iron skillet. Place the skillet over medium heat and heat the oil until shimmering. Working in batches, fry the eggplant in the skillet for roughly 3 minutes a side or until golden brown. Transfer the fried eggplant to a large plate lined with paper towel.
1/4 cup canola oil
Butter 1 side of each of the slices of bread and place them on a baking sheet, butter-side-down. Spread 2-3 tablespoons worth of the marinara sauce on each slice of bread. On half of slices of bread, top the sauce with 3 slices of mozzarella. Top the mozzarella with 3 fried eggplant medallions followed by 3 more slices of mozzarella. Sprinkle the mozzarella with the remaining Parmesan and finish with 4-5 fresh basil leaves. Place the sauce-only slices on top of the stacked slices.
8 slices sandwich bread, 1 batch Simple Marinara, 1 340g/12oz mozzarella ball, sliced, 2 tablespoons butter, Handful of fresh basil leaves
Wipe the cast iron skillet of excess oil and place over medium-low heat. Fry the sandwiches, two at a time, until the cheese melts and the bread is golden brown, about 5-7 minutes a side. ***
Place the sandwiches on a plate and place the plate in a 150°F oven to keep them warm before moving on to the remaining sandwiches. Serve the sandwiches immediately with additional marinara sauce for dipping.