Baked Eggplant

I think this is a really nice low fat dish. However when i cooked it:

1/2 cup fat-free mayonnaise

1 tablespoon minced onion

1 lb unpeeled eggplant, sliced-about 12 (1/2 inch slices)

1/3 cup fine dry breadcrumb

1/3 cup grated parmesan cheese

1/2 teaspoon dried Italian seasoning

vegetable oil cooking spray

I crumbed the eggplant and oven baked it.

Then covered it with diced tomato and shredded cheese

The result as below