Prep Eggplant: Slice eggplants, sprinkle with salt, and let sit for 20 minutes. Pat dry with paper towels.
Roast Eggplant: Brush slices with olive oil and roast at 200°C (400°F) for 20 minutes until golden and tender.
Make Cheese Mix: In a bowl, combine ricotta, half of the parmesan, garlic, oregano, basil, salt, and pepper.
Assemble Lasagna: In a baking dish, spread marinara sauce. Add a layer of roasted eggplant, then cheese mixture, then mozzarella. Repeat layers until ingredients are used.
Bake: Top with remaining mozzarella and parmesan. Bake at 190°C (375°F) for 25–30 minutes, until bubbly and golden.
Rest & Serve: Let cool for 10 minutes. Garnish with fresh basil and serve warm.