Preheat the oven to 400°F and line 2 baking sheets with parchment paper.
In a medium-sized shallow dish, add the milk.
In another medium-sized shallow dish, combine the Panko, 1 cup Parmesan cheese, oregano, thyme, red pepper flakes, salt, and several grinds of pepper.
One at a time, dip the eggplant slices into the milk and then into the Panko mixture. Place all of the breaded slices onto the baking sheets, drizzle with olive oil, and bake for 18 minutes or until tender and golden brown.
In an 8x12 or 9x13-inch baking dish, spread ½ cup marinara, layer half the eggplant, and top with 1 cup of marinara, sprinkle on half the lentils and half the mozzarella. Repeat with the remaining eggplant, marinara, lentils and mozzarella. Sprinkle with the remaining ¼ cup Parmesan cheese, drizzle with olive oil, and sprinkle with a few more pinches of salt.
Bake for 20-25 minutes or until the cheese is nicely melted.
Remove from the oven and top with fresh basil. Serve warm.