Place puff pastry slices next to each other on a lightly floured work surface and allow to thaw for approx. 10 minutes. Wash, clean and chop the zucchini. Coarsely grate the cheese. Heat oil and fry minced meat until crumbly.
Fry the zucchini and marjoram briefly. Add tomato paste and sweat in it. Add 100 ml water, bring to the boil. Season to taste with salt and cayenne pepper, let it cool down a bit. Put the puff pastry slices back on top of each other and roll out on the floured work surface.
Cut out 12 circles (each 11 cm Ø). Grease the recesses of a muffin tin (12 recesses). Put in dough circles and press them on. Mix 2/3 of the cheese rasp into the minced mass and distribute in the hollows.
Whisk eggs and milk, season with salt, pepper and nutmeg. Pour over the mince. Sprinkle with remaining cheese. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 25-30 minutes.
Serve garnished with marjoram and pepperoni.