Press crescent roll dough into a greased 8x8 inch pan.
Melt butter in a medium skillet; add chopped onion and chopped zucchini and saute over medium heat 5 minutes (until tender-crisp).
In a medium mixing bowl, beat eggs and then stir in spices.
Add a small amount of onion/zucchini mixture to eggs to temper them; then add remainder of mixture and stir together.
Stir in shredded mozzarella.
Pour mixture into unbaked crust; bake at 400 degrees for 25-30 min.