1. If your spinach isn't defrosted, you can put the frozen spinach in a pan and add about 50 ml of water. Cover the pan and let it simmer for about 10 min. Stirring it a few times. When the spinach is cooked and most of the water has evaporated drain the spinach in a colander and let it cool down for a few minutes before adding the spinach to you ricotta mixture (be patient or the egg will scramble).