Peel the potatoes, rinse then cut into three, place in deep saucepan well covered with water. Bring to a simmer and cook until very tender, about 20 minutes.
Strain potatoes using a colander and drain thoroughly.
Using a ricer or a masher, mash the potatoes in a mixing bowl.
Melt the butter and pour into potato mash. Add egg yolks, nutmeg, salt and pepper. Mix well.
Grease a baking sheet pan with olive oil.
Place a large star nozzle, such as a Wilton 1M open star tip, in a piping bag, fill the bag and pipe swirls directly onto the sheet pan. You should be able to get 16 – 20.
Bake in oven for 15-20 min at 430° or until golden brown. Rotate the pan halfway through cooking for even browning. Lift off the pan with a thin metal spatula and serve immediately.
Optional: Place them on the dish and drizzle your gravy and serve.