The Super-Secret Recipe File: Megan's light zucchini casserole

Megan wrote: "I found these recipes on This is my FAVORITE recipe web site, due to the huge number of recipes, as well as the fact that each recipe includes nutritional information."

And kudos, dear heart, on your continued weight loss!

1 pound zucchini, shredded       1 small onion, grated
1/3 cup buttermilk       2 tablespoons vegetable oil
1/2 cup grated Parmesan cheese       1 cup biscuit baking mix