Defrost the puff pastry slices laid on top of each other. Wash, sort and roughly chop the spinach. Peel garlic and press it through a garlic press. Steam 1 garlic clove in hot fat.
Add the spinach and allow to completely collapse. Season with salt, pepper and nutmeg. Peel and finely chop the onion. Heat oil. Fry the remaining garlic, onion and minced meat for about 5 minutes, turning.
Crumble feta cheese. Mix with peppercorns. Whisk cream and eggs. Season with salt, pepper and dried herbs. Roll out the puff pastry on a floured work surface until round (26-28 cm Ø).
Place in a greased casserole dish (24 cm Ø). Layer spinach, minced lamb and feta cheese. Pour whisked eggs over them. Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 35 minutes.