Eggplant Italiano

I haven't made this in years.  Found the recipe in an old recipe box.  It was one of my favorites in the past.  I got the recipe from Elli Patella, who was married to Denny.  Elli is Jewish and Denny is Italian, so I imagine she got the recipe from someone like her mother-in-law.

Marinera Sauce:

1 medium onion, chopped
1 pint of stewed tomatoes, mashed
salt, pepper, oregano, and sweet basil
1 or 2 cloves of garlic, crushed

1 eggplant, sliced
1 pound of mozzarella, sliced
Parmesan cheese

Preheat the oven to 400 degrees.
Brush the eggplant slices with olive oil as lightly as possible.
Arrange the slices in a single layer in a large baking dish.
Bake in the oven while making the Marinera  sauce.
When sauce is ready, pour it over the eggplant, they layer the cheese on top, and sprinkle with Parmesan cheese.
Bake for 15-20 minutes.

note: if making for children, you can peel the eggplant.  Well you can peel it even if not making for children, if you like.