Delicate Pinwheel Eggplant Parmesan

3-4 T. extra virgin olive oil2 c. of olive oil for frying, more if needed1 large Vidalia onion, finely chopped4 T. minced garlic2 (28-oz.) cans good quality whole, peeled Italian tomatoes, drainedSalt, black pepper, garlic powder8 small eggplants, cut lengthwise…