Preheat your oven. Set it to 425°F (220°C).
Line a large baking sheet with parchment paper for easy cleanup.
Slice the eggplant. Cut into 1/2-inch-thick rounds. Keep them uniform so they cook evenly. You should get 10–14 slices from a large eggplant.
Season the rounds. Arrange on the baking sheet.
Brush or drizzle with olive oil on both sides. Sprinkle lightly with salt, pepper, garlic powder, and a little dried oregano.
Pre-roast to set the “crust.” Bake for 15–18 minutes, flipping once halfway. You want the slices tender and edges just turning golden, not collapsing.
Pat dry if needed. If the slices look glossy with moisture, dab lightly with a paper towel.
This helps prevent sogginess.
Add sauce and cheese. Spoon 1–2 teaspoons of marinara on each round. Top with a small handful of mozzarella and a pinch of Parmesan.
Add toppings. Keep them light so the eggplant can handle the weight. Thinly sliced veggies and pre-cooked proteins work best.
Back into the oven. Return the tray to the 425°F oven for 6–8 minutes, until the cheese melts.
Broil for a finish. Switch to broil for 1–2 minutes to bubble and brown the cheese.
Watch closely to avoid burning.
Garnish and serve. Sprinkle with fresh basil and an extra pinch of oregano or red pepper flakes. Let cool 2–3 minutes so they set slightly, then serve warm.