Mix the dumpling powder according to the instructions on the packet. Form 18 to 20 small dumplings out of this and place in a baking dish.
Dice the onion and sauté until translucent. Add the squeezed garlic and the ham cut into cubes and fry a little. Now add the spinach and season with salt, pepper, nutmeg and broth. Pour in the cream and milk and let everything simmer. Stir in the processed cheese and let it melt.
Pour everything over the dumplings and slide the gratin into the oven preheated to 175 ° C. Cook for about 20 minutes, then sprinkle with the cheese and grill for another 20 minutes.