Peel and dice the potatoes and cook them in salted water until soft. Let it steam off briefly. Press through the potato press.
Mix well and quickly with the yolk, eggs, butter and spices.
Use the dressing sack to sprinkle small, even rosettes onto the baking sheet. Leave these in the oven at 200 ° until they have a nice golden brown color. If you like, you can sprinkle some parmesan on top before baking.