1. Preheat oven to 350° F.
2. Heat margarine in a small non-stick skillet.
3. Once hot, add onions to skillet and sauté.
4. While onions tenderize, combine spinach, eggs, cottage cheese, and shredded cheese in a large bowl.
5. Once the onions are tender, pour the spinach, egg, and cheese mixture into the skillet.
6. Place skillet in preheated oven and bake uncovered for 50 to 60 minutes or until fully set.
7. Once cooked, serve and enjoy!