Salt the eggplant slices and let them sit for 15 minutes to draw out bitterness. Pat them dry with a towel.
Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
Prepare the coating by mixing breadcrumbs, nutritional yeast, garlic powder, onion powder, oregano, and black pepper in a bowl.
Whisk plant milk and cornstarch in a separate bowl until smooth.
Dip each eggplant slice into the milk mixture, then coat it in the breadcrumb mixture.
Arrange the breaded eggplant on the baking sheet and bake for 20 minutes, flipping halfway through.
Heat olive oil in a skillet and sauté garlic until fragrant. Stir in marinara sauce and red pepper flakes. Simmer for 5 minutes.
Layer the baked eggplant in a baking dish, spoon marinara sauce over each slice, and sprinkle with vegan Parmesan.
Return to the oven and bake for 10 more minutes until golden and bubbly.
Garnish with fresh basil and serve hot with pasta or bread.