Using a mandoline slicer or a sharp knife, slice the eggplant into thin ⅛-inch rounds. Make them all the same width so they cook at the same rate.
Transfer the eggplant to a large mixing bowl and toss with the oil and spices until evenly coated.
Arrange the seasoned eggplant in a single layer on the baking sheets.
Bake for 30-40 minutes, flipping halfway through, until crispy and browned. Watch the eggplant carefully as it cooks and take out any pieces early that are cooking faster than the others so they don't burn.
Let the eggplant chips cool completely before serving.