01 - Preheat the oven to 400°F (200°C). Line a baking tray with parchment paper and set aside.
02 - Heat olive oil in a skillet over medium heat. Sauté the minced garlic for about 30 seconds until fragrant, then add the chopped spinach. Cook for 2 to 3 minutes until fully wilted. Remove from heat and let cool slightly.
03 - In a mixing bowl, combine the sautéed spinach with crumbled feta, softened cream cheese, black pepper, and nutmeg. Stir until all ingredients are evenly blended into a uniform mixture.
04 - Roll out the gluten-free puff pastry on a surface lightly dusted with gluten-free flour. Spread the spinach and feta mixture evenly across the pastry, leaving a ½-inch border along one long edge.
05 - Starting from the filled long side, gently but firmly roll the pastry into a tight log. Brush the bare edge with a little beaten egg to seal the seam.
06 - Using a sharp knife, cut the log into 16 even slices. Arrange each pinwheel cut side up on the prepared baking tray, spacing them about 1 inch apart.
07 - Brush the tops of each pinwheel generously with the remaining beaten egg to ensure a rich golden finish during baking.
08 - Bake for 20 to 25 minutes until the pinwheels are puffed and golden brown on top. Allow to cool slightly on the tray before serving warm or at room temperature.