Mini Spinach Frittata

Boil, steam or microwave spinach until tender, rinse under cold water; drain, chop finely. Heat oil in pan, add onion and water, cover, cook until onion is soft. Combine spinach, onion mixture, nutmeg, egg whites and milk in a bowl. Lightly grease 4 egg rings with a little of the extra oil. Add remaining extra oil in a non-stick pan, place egg rings in pan, fill with egg mixture. Cook until mixture is set, remove egg rings, turn frittata, cook until lightly browned underneath.