Preheat the oven to 320°F/ 160°C. Line the baking sheet with parchment paper.
Wash the spinach in a large colander and shake it very well to remove the excess water.5.5 oz baby spinach
Eggs: Separate the eggs. Beat the egg whites with a pinch of salt. Set aside.4 large eggs
Blend the spinach: Place the spinach in the food processor. Add the egg yolks, milk, and oil, and process everything until smooth (you can also use an immersion blender for this step). Transfer the mixture to the bowl.spinach + egg yolks + 2 tablespoons milk + 2 tablespoons olive oil
Add dry ingredients: Mix flour, baking powder, and salt in a small bowl. Fold them into the spinach mixture.¾ cup all-purpose flour + ½ teaspoon baking powder + ½ teaspoon fine sea salt
Add the egg whites: Gently fold in about ⅓ of the beaten egg whites to mix. Once the mixture is mostly smooth, fold in the rest of the egg whites in two batches, being careful not to stir too much, until fully combined.
Bake: Pour the mixture onto the prepared baking sheet and bake at 160°C (320°F) for 15 minutes.
Roll and cool: Remove from the oven, roll the spinach base with the parchment paper, and let it cool completely on a wire rack. In the meantime, make the filling.
Cream cheese filling:
Make the filling: Stir the softened cream cheese with garlic powder, salt, pepper, chopped parsley, and green onions. Taste and adjust the seasoning if needed.1½ cups cream cheese + 2 tablespoons parsley + 2 green onions + ½ teaspoon garlic powder + ¼ teaspoon fine sea salt + ⅛ teaspoon ground black pepper
Assemble the roulade:
Unroll the fully cooled spinach base on your work surface.
Spread the cream cheese mixture evenly over it, leaving a small border around the edges. Sprinkle the Parmesan on top.3 tablespoons Parmesan
Roll the spinach roulade up tightly and wrap it in cling film.
Refrigerate for at least 3–4 hours or overnight. Unwrap and slice thickly before serving.
Notes
Cream cheese: You can use soft cream cheese in a plastic container or block cream cheese. If using block cream cheese, let it sit at room temperature for about 30 minutes so it softens and blends easily.
You can also use store-bought herbed cream cheese (like chive or garlic and herb) instead of plain cream cheese and season it to taste.
Garlic: You can use 1-3 grated garlic cloves (to taste) instead of garlic powder.