First, preheat the oven at 180℃ (356℉);
Now, you need to cook the spinach if you are using fresh spinach. For this, it is important to rinse the spinach leaves and place them into a pot with water. Boil them for 10 minutes. If you use frozen spinach, all you have to do is to defrost it;
Leave the cooked spinach to drain and completely cool into a sieve;
Now, place the butterfly whisk into the mixing bowl of the Thermomix;
Separate the egg yolks from the egg whites and place the egg whites into the mixing bowl; Add ½ tsp salt;
Whip the egg whites 4 MIN – SPEED 3.5. If you use a mixer, whip the egg whites at high speed for 3-4 minutes; Transfer the egg whites foam into a different bowl;
Place the sour cream for the dough, the eggs and the spinach into the mixing bowl and mix them 1 MIN – SPEED 5. You can do the same thing using a mixer
Add the egg whites foam and gently incorporate it with a spatula. Add salt and black pepper to taste;
Mix the flour with the baking soda and the baking flour and add it into the mixing bowl using a flour sifter;
Gently incorporate the flour into the composition using a spatula;
Pour the batter into a backing tray covered with baking paper. Use a spatula to level the batter into the baking tray
Bake the spinach dough into the preheated oven at 180℃ (356℉) for 15 MINUTES
Take out the baked spinach dough from the oven and place it on a wet towel (leave the backing tray on the bottom of the dough)
Roll the spinach dough using the towel and leave it to sit rolled until you make the filling;
Now, it’s time for the filling. For this, you can cut the vegetables into small pieces with a knife or you can use the Thermomix, like I did
Place the vegetables cut into pieces into the mixing bowl, add the soft butter, sour cream, cream cheese, salt and black pepper to taste;
Mix them well 1 MIN – SPEED 5;
Cover the spinach dough with the cream cheese filling, using a spatula or a knife, making sure you leave the edges of the spinach dough without cream cheese;
Roll the dough and remove the baking paper;
Place the spinach roll into plastic wrap and leave it info the fridge for 3 hours before serving it
Serve the spinach roll with cream cheese as a starter for you festive/ family meals;