Step 1

Preheat the oven to 350 degrees. Spray a 9x13 inch baking dish with nonstick cooking spray. Set that aside.

Step 2

Grate the zucchini and chop the onions. Set that aside.

Step 3

In a large bowl, add the eggs, olive oil, and Bisquick. Mix well.

Step 4

Add the shredded zucchini, chopped onion, cheddar cheese, parmesan cheese, and seasonings. Mix until fully combined.

Step 5

Pour the mixture into the prepared baking dish. Bake for 40 minutes or until the top of the casserole is golden brown. Allow the casserole to cool slightly and then cut into squares.