Preheat oven to 395F. Slice eggplants into bite size pieces, put into a bowl with olive oil and seasonings, toss to coat. Pour on to sheet pan and bake for 30 minutes.
Spray 9x13" casserole dish with non stick spray and pour in half roasted eggplant, then layer half the mozzarella cheese, layer with rest of eggplant, the remaining mozzarella and top with parmesan cheese.
Bake in the oven for 15 minutes or until golden brown and cheese is bubbling. Serve immediately for best results.