Stir together the zucchini, oil, eggs, Bisquick, Parmesan, cheddar, onion and salt.
Spray baking dish with oil
Add a layer of bread crumbs.
Transfer the mixture to a pie dish and use your fingers, if necessary, to evenly spread the zucchini throughout the dish.
Pre-heat oven to 375F
Pop it in the oven and bake for 35 minutes [or until golden brown]
Broil for an extra minute [optional]
Allow to cool for at least 10 minutes before serving.