Preheat oven to 350F degrees.
Thaw or microwave Marinara Sauce (as directed on the package).
In a bowl, combine the breadcrumbs with with salt and pepper.
In another bowl, whisk together the eggs and season with salt and pepper.
Dip each zucchini slice in the egg mixture, and then in the breadcrumbs. Make sure to coat both sides of each slice of zucchini.
Arrange them in single layers on a baking sheet(s).
In a large skillet, pour enough oil to accumulate about 1/2-inch in the bottom. Heat the oil.
Once hot, add a single layer of zucchini to the pan. Cook them until they are golden brown, about 2 minutes on each side.
Remove from the oil and transfer to a baking sheet lined with a paper towel so the zucchini can drain as the others cook.
Season lightly with salt.