Zucchini bisquick bake

Why I Love This Recipe
Got this from my mother in law. Very addicting. Great for lunch or as a snack for guests.
Ingredients You'll Need
3 eggs, beaten
1/2 cup oil
pinch of salt & pepper
dash of oregano
1 cup bisquick
small package of mozzarella, grated
aprox 1/4 cup grated cheese
1 medium onion, coarsely chopped
2 medium size zucchini, sliced thin
Directions
Mix eggs, oil, salt , pepper, grated cheese & oregano. Add onion, zucchini & mozzarella. Mix. Pour in bisquick & mix until blended. Butter a small baking pan {aprox 9x13}. Pour mixture in & & bake at 350 for aprox 45-1 hour. Ready when top is golden brown & toothpick comes out clean.