Preheat oven to 325 degrees F.
Cook spinach according to package directions. Squeeze all of the liquid out and set aside.
In a large bowl, whisk eggs, add cheese, onion, salt and pepper. Stir in spinach.
Spray a 9-inch pie plate with cooking spray. Add spinach mixture.
Cook for 30-35 minutes or until set.
by The Savvy Kitchen