Defrost the puff pastry. Clean and wash the spinach. Peel and chop garlic and fry in hot oil. Add the spinach and let it collapse. Season with salt, pepper and nutmeg. Let cool off
Grate cheese. Wash the chives and chop finely. Mix with sour cream, about 2/3 cheese, salt, pepper and nutmeg
Cut the slices of dough in half crosswise and place them on 2 baking trays lined with baking paper. Spread half of the sour cream on top. Spread spinach, ham, rest of sour cream and cheese on top. Fold the dough corners upwards
Whisk the egg yolks with 1 tbsp. water. Spread the edges of the dough with it. Bake one after the other in a preheated oven (electric oven: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 20 minutes