Zucchini Casserole - cooking recipe

Ingredients

2 c. zucchini, grated
1 medium onion
3 eggs
1/2 c. oil
1/2 c. Bisquick
1/2 lb. Colby cheese, grated
1/2 lb. medium Cheddar, grated (save 1/4 c. cheese for top)

Preparation

Note:
If you double recipe, use 13 x 9-inch pan.