I received this recipe years ago from a friend in Hawaii. It is delicious and great to take to parties. Everyone thinks it is very fancy but is it quick and easy.
Preheat oven to 350 degrees. Cover spinach in pan of water, cook until boiling, then drain well to remove all water. Combine spinach with shredded cheese. In a separate bowl, combine other ingredients. Mix well, then add to spinach/cheese mixture.
Melt butter/margarine in casserole dish. Add mixture to dish, spread evenly and bake 45 minutes. Do not overcook, or souffle will be dry. Cut into squares to serve.