Preheat oven broiler.
Place half the eggplant slices on a broiler pan rack coated with a little olive oil and sprinkle with half of the pepper. Broil 4 inches from heat source for 4 to 8 minutes per side or until lightly browned and tender. Repeat with remaining eggplant and black pepper. Reset oven to 350 degrees.
In a medium bowl, combine marinara sauce, taco sauce and cumin. Spread 1/2 cup of sauce in a large baking dish and arrange half of the eggplant slices on top. Spread 1 1/4 cups sauce, half of each of the cheeses and 1/4 cup of chopped cilantro on top.
Repeat layering with remaining eggplant, sauce and cheeses. Cover baking dish with aluminum foil wrap and bake for 40 minutes or until bubbly.
Allow baked eggplant to rest for 10 minutes then sprinkle with remaining cilantro and serve.