Preheat the oven to 400°C.
Halve the eggplant lengthwise and then slice to about 1/3 inch thick slices.
Mix together lemon juice, salt and olive oil.
Lay the eggplant slices on the baking tray in one layer, brush with the olive oil mixture and sprinkle with half of the sesame seeds.
Turn the slices over and repeat on the other side.
Bake the eggplant for 10 minutes, then turn over the slices and bake for another 10 minutes.